75 changed files with 1809 additions and 13021 deletions
--- a/backupdl-module.nix
+++ b/backupdl-module.nix
@ -1,56 +0,0 @@
-{ config, pkgs, lib, ... }:
-with lib;
-let
-  makeBackup = pkgs.writeScript "make-backupdl" ''
-    #!${pkgs.bash}/bin/bash
-
-    set -e
-
-    export PATH=${pkgs.rsync}/bin:${pkgs.openssh}/bin
-
-    FILENAME=backup-`${pkgs.coreutils}/bin/date +%F`.tar.bz2.gpg
-
-    ssh nixbld.m-labs.hk mlabs-backup > /hdd/backupdl/backupdl/$FILENAME
-    rsync -az nixbld.m-labs.hk:/var/lib/nextcloud/data /hdd/backupdl/nextcloud
-  '';
-
-  cfg = config.services.backupdl;
-in
-{
-  options.services.backupdl = {
-    enable = mkOption {
-      type = types.bool;
-      default = false;
-      description = "Enable backups";
-    };
-  };
-
-  config = mkIf cfg.enable {
-    systemd.services.backupdl = {
-      description = "Nixbld backups download";
-      serviceConfig = {
-        Type = "oneshot";
-        User = "backupdl";
-        Group = "backupdl";
-        ExecStart = "${makeBackup}";
-      };
-    };
-
-    users.users.backupdl = {
-      name = "backupdl";
-      group = "backupdl";
-      description = "Nixbld backups download";
-      isSystemUser = true;
-      createHome = true;
-      home = "/hdd/backupdl";
-      useDefaultShell = true;
-    };
-    users.extraGroups.backupdl = {};
-
-    systemd.timers.backupdl = {
-      description = "Nixbld backups download";
-      wantedBy = [ "timers.target" ];
-      timerConfig.OnCalendar = "wednesday,sunday *-*-* 08:00:00";
-    };
-  };
-}
--- a/m-labs-intl/60-tunnels.yaml
+++ b/m-labs-intl/60-tunnels.yaml
@ -1,18 +0,0 @@
-network:
-   version: 2
-   renderer: networkd
-   ethernets:
-     eth0:
-       addresses:
-       - 5.78.86.156/32
-       - 2a01:4ff:1f0:83de::2/64
-       - 2a01:4ff:1f0:83de::3/64
-       - 2a01:4ff:1f0:83de::4/64
-   tunnels:
-     gre1:
-       mode: gre
-       local: 5.78.86.156
-       remote: 94.190.212.123
-       addresses:
-        - 10.47.3.0/31
-
--- a/m-labs-intl/gretun.service
+++ b/m-labs-intl/gretun.service
@ -1,14 +0,0 @@
-[Unit]
-Description=GRE tunnel to the main host
-After=network.target
-
-[Service]
-Type=simple
-User=root
-ExecStart=/root/gretun.sh
-ExecStop=/root/gretun_down.sh
-Restart=on-failure
-RemainAfterExit=yes
-
-[Install]
-WantedBy=multi-user.target
--- a/m-labs-intl/gretun.sh
+++ b/m-labs-intl/gretun.sh
@ -1,10 +0,0 @@
-#!/bin/bash
-
-/usr/sbin/iptables -t nat -A PREROUTING -p tcp -i eth0 --dport 25 -j DNAT --to-destination 10.47.3.1:25
-/usr/sbin/iptables -A FORWARD -p tcp -d 10.47.3.1/31 --dport 25 -j ACCEPT
-
-/usr/sbin/iptables -t nat -A PREROUTING -p tcp -i eth0 --dport 587 -j DNAT --to-destination 10.47.3.1:587
-/usr/sbin/iptables -A FORWARD -p tcp -d 10.47.3.1/31 --dport 587 -j ACCEPT
-
-/usr/sbin/iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
-/usr/sbin/iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
--- a/m-labs-intl/gretun_down.sh
+++ b/m-labs-intl/gretun_down.sh
@ -1,10 +0,0 @@
-#!/bin/bash
-
-/usr/sbin/iptables -t nat -D PREROUTING -p tcp -i eth0 --dport 25 -j DNAT --to-destination 10.47.3.1:25
-/usr/sbin/iptables -D FORWARD -p tcp -d 10.47.3.1/31 --dport 25 -j ACCEPT
-
-/usr/sbin/iptables -t nat -D PREROUTING -p tcp -i eth0 --dport 587 -j DNAT --to-destination 10.47.3.1:587
-/usr/sbin/iptables -D FORWARD -p tcp -d 10.47.3.1/31 --dport 587 -j ACCEPT
-
-/usr/sbin/iptables -D FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
-/usr/sbin/iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE
--- a/m-labs-intl/m-labs-intl.com
+++ b/m-labs-intl/m-labs-intl.com
@ -1,81 +0,0 @@
-upstream rfq_server {
-    server 127.0.0.1:5000;
-}
-
-server {
-    limit_conn addr 5;
-
-    root /var/www/m-labs-intl.com/html;
-    index index.html index.htm index.nginx-debian.html;
-
-    server_name m-labs-intl.com;
-
-    location / {
-        try_files $uri $uri/ =404;
-    }
-
-    listen [::]:443 ssl ipv6only=on; # managed by Certbot
-    listen 443 ssl; # managed by Certbot
-    ssl_certificate /etc/letsencrypt/live/m-labs-intl.com/fullchain.pem; # managed by Certbot
-    ssl_certificate_key /etc/letsencrypt/live/m-labs-intl.com/privkey.pem; # managed by Certbot
-    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
-    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
-}
-
-server {
-    server_name www.m-labs-intl.com;
-    return 301 https://m-labs-intl.com$request_uri;
-
-    listen [::]:443 ssl; # managed by Certbot
-    listen 443 ssl; # managed by Certbot
-    ssl_certificate /etc/letsencrypt/live/m-labs-intl.com/fullchain.pem; # managed by Certbot
-    ssl_certificate_key /etc/letsencrypt/live/m-labs-intl.com/privkey.pem; # managed by Certbot
-    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
-    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
-}
-
-server {
-    server_name hooks.m-labs-intl.com;
-    limit_conn addr 5;
-
-    location /rfq {
-        proxy_pass http://rfq_server/rfq;
-        proxy_set_header Host $host;
-        proxy_set_header X-Real-IP $remote_addr;
-        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-        proxy_set_header X-Forwarded-Proto $scheme;
-        proxy_read_timeout 30;
-        proxy_connect_timeout 30;
-        proxy_send_timeout 30;
-    }
-
-    location / {
-        return 418;
-    }
-
-    listen [::]:443 ssl; # managed by Certbot
-    listen 443 ssl; # managed by Certbot
-    ssl_certificate /etc/letsencrypt/live/m-labs-intl.com/fullchain.pem; # managed by Certbot
-    ssl_certificate_key /etc/letsencrypt/live/m-labs-intl.com/privkey.pem; # managed by Certbot
-    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
-    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
-}
-
-server {
-    limit_conn addr 5;
-    if ($host = m-labs-intl.com) {
-        return 301 https://$host$request_uri;
-    } # managed by Certbot
-
-
-    if ($host = www.m-labs-intl.com) {
-        return 301 https://m-labs-intl.com$request_uri;
-    } # managed by Certbot
-
-
-    listen 80;
-    listen [::]:80;
-
-    server_name m-labs-intl.com www.m-labs-intl.com hooks.m-labs-intl.com;
-    return 301 https://$host$request_uri;
-}
--- a/m-labs-intl/m-labs.hk.conf
+++ b/m-labs-intl/m-labs.hk.conf
@ -1,34 +0,0 @@
-
-
-connections {
-  m_labs {
-    version = 2
-    encap = no
-    mobike = no
-    send_certreq = no
-    proposals = aes128gcm128-sha256-prfsha256-curve25519,aes128gcm128-sha256-prfsha256-ecp256
-    local_addrs = 5.78.86.156
-    remote_addrs = 94.190.212.123
-    local {
-      auth = pubkey
-      id = fqdn:m-labs-intl.com
-      pubkeys = m-labs-intl.com
-    }
-    remote {
-      auth = pubkey
-      id = fqdn:m-labs.hk
-      pubkeys = m-labs.hk
-    }
-    children {
-      con1 {
-        mode = transport
-        ah_proposals = sha256-curve25519,sha256-ecp256
-        esp_proposals =
-        local_ts = 5.78.86.156[gre]
-        remote_ts = 94.190.212.123[gre]
-        start_action = start
-        close_action = none
-      }
-    }
-  } 
-}
--- a/m-labs-intl/mail.secret
+++ b/m-labs-intl/mail.secret
--- a/m-labs-intl/nginx.conf
+++ b/m-labs-intl/nginx.conf
@ -1,65 +0,0 @@
-user www-data;
-worker_processes auto;
-pid /run/nginx.pid;
-error_log /var/log/nginx/error.log;
-include /etc/nginx/modules-enabled/*.conf;
-
-events {
-	worker_connections 768;
-	# multi_accept on;
-}
-
-http {
-
-	##
-	# Basic Settings
-	##
-
-	sendfile on;
-	tcp_nopush on;
-	types_hash_max_size 2048;
-	# server_tokens off;
-
-	server_names_hash_bucket_size 64;
-	# server_name_in_redirect off;
-
-	include /etc/nginx/mime.types;
-	default_type application/octet-stream;
-
-	##
-	# SSL Settings
-	##
-
-	ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3; # Dropping SSLv3, ref: POODLE
-	ssl_prefer_server_ciphers on;
-
-	# Rate limiting
-	limit_conn_zone $binary_remote_addr zone=addr:10m;
-
-	##
-	# Logging Settings
-	##
-
-	access_log /var/log/nginx/access.log;
-
-	##
-	# Gzip Settings
-	##
-
-	gzip on;
-
-	# gzip_vary on;
-	# gzip_proxied any;
-	# gzip_comp_level 6;
-	# gzip_buffers 16 8k;
-	# gzip_http_version 1.1;
-	gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
-
-	##
-	# Virtual Host Configs
-	##
-
-	include /etc/nginx/conf.d/*.conf;
-	include /etc/nginx/sites-enabled/*;
-}
-
--- a/m-labs-intl/rfq.service
+++ b/m-labs-intl/rfq.service
@ -1,12 +0,0 @@
-[Unit]
-Description=RFQ service
-After=network.target
-
-[Service]
-Type=simple
-User=rfqserver
-ExecStart=/home/rfqserver/runrfq.sh
-Restart=on-failure
-
-[Install]
-WantedBy=multi-user.target
--- a/m-labs-intl/runrfq.sh
+++ b/m-labs-intl/runrfq.sh
@ -1,14 +0,0 @@
-#!/usr/bin/env bash
-
-export FLASK_DEBUG=0
-export FLASK_MAIL_SERVER=mail.m-labs.hk
-export FLASK_MAIL_PORT=465
-export FLASK_MAIL_USE_SSL=True
-export FLASK_MAIL_USERNAME=sysop-intl@m-labs-intl.com
-export FLASK_MAIL_PASSWORD_FILE=/home/rfqserver/mail.secret
-export FLASK_MAIL_RECIPIENT=sales@m-labs.hk
-export FLASK_MAIL_SENDER=sysop-intl@m-labs-intl.com
-
-cd /home/rfqserver/web2019/server
-source venv/bin/activate
-python3 -m flask --app rfq run --port=5000
--- a/m-labs-intl/setup.md
+++ b/m-labs-intl/setup.md
@ -1,99 +0,0 @@
-# Setup m-labs-intl.com server
-
-```shell
-# Install required packages
-apt install git nginx-full python3 python3.12-venv python3-pip iptables ufw \
-  strongswan strongswan-swanctl strongswan-pki strongswan-libcharon
-snap install --classic certbot
-ln -s /snap/bin/certbot /usr/bin/certbot
-
-# Set up networks (includes GRE)
-cp 60-tunnels.yaml /etc/netplan/
-netplan apply
-
-# set up IPsec-AH connection
-cp m-labs.hk.conf /etc/swanctl/conf.d/
-echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf
-sysctl -p
-cp m-labs.hk /etc/swanctl/pubkey/m-labs.hk # get pubkey from nixbld
-pki --gen --type rsa --size 4096 --outform pem > /etc/swanctl/private/m-labs-intl.com
-pki --pub --in /etc/swanctl/private/m-labs-intl.com --outform pem > /etc/swanctl/pubkey/m-labs-intl.com
-cp /etc/swanctl/pubkey/m-labs-intl.com m-labs-intl.com # add it to the nixbld
-systemctl enable strongswan --now
-systemctl restart strongswan
-
-# Set up website
-cp m-labs-intl.com /etc/nginx/sites-available/
-cp nginx.conf /etc/nginx/
-ln -s /etc/nginx/sites-available/m-labs-intl.com /etc/nginx/sites-enabled/
-systemctl enable nginx --now
-service nginx restart
-
-# Issue SSL certificate - website only, the mail is on the HK side
-certbot --nginx
-service nginx restart
-
-# Create a user for automatic website deployment from nixbld
-useradd -m zolaupd
-mkdir -p /var/www/m-labs-intl.com/html
-chown -R zolaupd /var/www/m-labs-intl.com/
-sudo -u zolaupd sh -c '
-  cd /home/zolaupd;
-  mkdir /home/zolaupd/.ssh;
-  echo -n "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIP1OJJM8g/1ffxDjN31XKEfGmrYaW03lwpyTa1UGWqVx
-  ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIF6R6XK0IiuAKxVKvSABm4m9bfOlvfJcMvTpjenuXUPv" > /home/zolaupd/.ssh/authorized_keys
-  chmod 700 .ssh/
-  chmod 600 .ssh/authorized_keys
-  '
-
-# Create a user for RFQ hooks service
-useradd -m rfqserver
-cp runrfq.sh /home/rfqserver/
-cp mail.secret /home/rfqserver/
-chown rfqserver /home/rfqserver/runrfq.sh
-chmod +x /home/rfqserver/runrfq.sh
-chown rfqserver /home/rfqserver/mail.secret
-
-sudo -u rfqserver sh -c '
-  cd /home/rfqserver;
-  git clone https://git.m-labs.hk/M-Labs/web2019.git;
-  cd web2019;
-  python3 -m venv ./venv;
-  source venv/bin/activate;
-  pip install -r requirements.txt;
-'
-cp rfq.service /etc/systemd/system/
-
-# Automate port forwarding rules creation
-cp gretun.sh /root/gretun.sh
-cp gretun_down.sh /root/gretun_down.sh
-chmod u+x /root/gretun.sh
-chmod u+x /root/gretun_down.sh
-cp gretun.service /etc/systemd/system/
-
-# Enable custom services
-systemctl daemon-reload
-systemctl enable rfq.service --now
-systemctl enable gretun.service --now
-
-# Setup basic firewall rules  
-ufw default deny
-ufw default allow outgoing
-
-ufw allow from 94.190.212.123
-ufw allow from 2001:470:f891:1::/64
-ufw allow from 202.77.7.238
-ufw allow from 2001:470:18:390::2
-ufw allow "Nginx HTTP"
-ufw allow "Nginx HTTPS"
-ufw limit OpenSSH
-ufw allow 25/tcp
-ufw allow 587/tcp
-ufw limit 500,4500/udp
-
-ufw route allow in on gre1 out on eth0
-ufw allow from 10.47.3.0/31
-
-ufw show added
-ufw enable
-```
--- a/nixbld-etc-nixos/afws-module.nix
+++ b/nixbld-etc-nixos/afws-module.nix
@ -1,66 +0,0 @@
-{ config, pkgs, lib, ... }:
-with lib;
-let
-  afws = pkgs.callPackage ./afws { inherit pkgs; };
-in
-{
-  options.services.afws = {
-    enable = mkOption {
-      type = types.bool;
-      default = false;
-      description = "Enable AFWS server";
-    };
-    logFile = mkOption {
-      type = types.str;
-      default = "/var/lib/afws/logs/afws.log";
-      description = "Path to the log file";
-    };
-    logBackupCount = mkOption {
-      type = types.int;
-      default = 30;
-      description = "Number of daily log files to keep";
-    };
-  };
-
-  config = mkIf config.services.afws.enable {
-    systemd.services.afws = {
-      description = "AFWS server";
-      wantedBy = [ "multi-user.target" ];
-      preStart = ''
-        mkdir -p "$(dirname ${config.services.afws.logFile})"
-        chown afws:afws "$(dirname ${config.services.afws.logFile})"
-      '';
-      serviceConfig = {
-        User = "afws";
-        Group = "afws";
-        ExecStart = ''
-          ${afws}/bin/afws_server \
-            --log-file ${config.services.afws.logFile} \
-            --log-backup-count ${toString config.services.afws.logBackupCount}
-        '';
-        ExecReload = "${pkgs.coreutils}/bin/kill -USR1 $MAINPID";
-      };
-      path = [ pkgs.nix pkgs.git ];
-    };
-
-    security.acme.certs."afws.m-labs.hk".postRun =
-      ''
-      mkdir -p /var/lib/afws/cert
-      cp cert.pem /var/lib/afws/cert
-      cp key.pem /var/lib/afws/cert
-      chown -R afws:afws /var/lib/afws/cert
-      '';
-    security.acme.certs."afws.m-labs.hk".reloadServices = [ "afws.service" ];
-
-    users.users.afws = {
-      name = "afws";
-      group = "afws";
-      description = "AFWS server user";
-      isSystemUser = true;
-      createHome = false;
-      home = "/var/lib/afws";
-      useDefaultShell = true;
-    };
-    users.extraGroups.afws = {};
-  };
-}
--- a/nixbld-etc-nixos/backup-module.nix
+++ b/nixbld-etc-nixos/backup-module.nix
@ -1,37 +1,27 @@
 { config, pkgs, lib, ... }:
 with lib;
 let
-  excludePaths = [
-    "/var/lib/gitea/repositories/*/*.git/archives"
-    "/var/lib/gitea/data/repo-archive"
-    "/var/lib/gitea/data/indexers"
-    "/var/vmail/m-labs.hk/js"
-    "/var/lib/afws/.cache"
-    "/var/lib/mattermost/data/2019*"
-    "/var/lib/mattermost/data/2020*"
-    "/var/lib/mattermost/data/2021*"
-    "/var/lib/mattermost/data/2022*"
-    "/var/lib/mattermost/data/2023*"
-  ];
  makeBackup = pkgs.writeScript "make-backup" ''
-    #!${pkgs.bash}/bin/bash -p
+    #!${pkgs.bash}/bin/bash

    set -e
    umask 0077

    DBDUMPDIR=`mktemp -d`
-    trap "rm -rf $DBDUMPDIR" EXIT
-    cd $DBDUMPDIR
+    pushd $DBDUMPDIR

-    ${config.services.mysql.package}/bin/mysqldump --user=root --single-transaction flarum > flarum.sql
-    ${config.services.postgresql.package}/bin/pg_dump mattermost > mattermost.sql
-    ${config.services.postgresql.package}/bin/pg_dump rt5 > rt.sql
-    ${config.services.postgresql.package}/bin/pg_dump gitea > gitea.sql
+    ${config.services.mysql.package}/bin/mysqldump --single-transaction flarum > flarum.sql
+    ${pkgs.sudo}/bin/sudo -u mattermost ${config.services.postgresql.package}/bin/pg_dump mattermost > mattermost.sql

-    exec 6< /etc/nixos/secret/backup-passphrase
-    ${pkgs.gnutar}/bin/tar cf - ${lib.concatMapStringsSep " " (p: "--exclude \"${p}\"") excludePaths} /etc/nixos /var/vmail /var/lib/hedgedoc /var/lib/gitea /var/lib/afws /var/lib/mattermost/data /var/www/193thz flarum.sql mattermost.sql rt.sql gitea.sql | \
+    ${pkgs.gnutar}/bin/tar cf - --exclude "/var/lib/gitea/repositories/*/*.git/archives" /etc/nixos /var/lib/gitea flarum.sql mattermost.sql | \
        ${pkgs.bzip2}/bin/bzip2 | \
-        ${pkgs.gnupg}/bin/gpg --symmetric --batch --passphrase-fd 6
+        ${pkgs.gnupg}/bin/gpg --symmetric --batch --passphrase-file /etc/nixos/secret/backup-passphrase | \
+        ${pkgs.rclone}/bin/rclone rcat --config /etc/nixos/secret/rclone.conf dropbox:backup-`date +%F`.tar.bz2.gpg
+
+    popd
+    rm -rf $DBDUMPDIR
+
+    echo Backup done
  '';
  cfg = config.services.mlabs-backup;
 in
@ -45,20 +35,20 @@ in
  };

  config = mkIf cfg.enable {
-    users.extraGroups.backupdl = { };
-    users.extraUsers.backupdl = {
-      isNormalUser = true;
-      extraGroups = ["backupdl" "nextcloud"];
-      openssh.authorizedKeys.keys = [
-        "ssh-rsa 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 backupdl@minipc"
-      ];
+    systemd.services.mlabs-backup = {
+      description = "M-Labs backup";
+      serviceConfig = {
+        Type = "oneshot";
+        User = "root";
+        Group = "root";
+        ExecStart = "${makeBackup}";
+      };
    };
-    security.wrappers.mlabs-backup = {
-      source = makeBackup;
-      setuid = true;
-      owner = "root";
-      group = "backupdl";
-      permissions = "g+x";
+
+    systemd.timers.mlabs-backup = {
+      description = "M-Labs backup";
+      wantedBy = [ "timers.target" ];
+      timerConfig.OnCalendar = "weekly";
    };
  };
 }
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
--- a/nixbld-etc-nixos/flarum/composer.lock
+++ b/nixbld-etc-nixos/flarum/composer.lock
--- a/nixbld-etc-nixos/flarum/default.nix
+++ b/nixbld-etc-nixos/flarum/default.nix
@ -1,39 +0,0 @@
-{
-  lib,
-  php,
-  fetchFromGitHub,
-  fetchpatch,
-}:
-
-php.buildComposerProject (finalAttrs: {
-  pname = "flarum";
-  version = "1.8.1";
-
-  src = fetchFromGitHub {
-    owner = "flarum";
-    repo = "flarum";
-    rev = "v${finalAttrs.version}";
-    hash = "sha256-kigUZpiHTM24XSz33VQYdeulG1YI5s/M02V7xue72VM=";
-  };
-
-  patches = [
-    # Add useful extensions from https://github.com/FriendsOfFlarum
-    # Extensions included: fof/upload, fof/polls, fof/subscribed
-    ./fof-extensions.patch
-  ];
-
-  composerLock = ./composer.lock;
-  composerStrictValidation = false;
-  vendorHash = "sha256-z3KVGmILw8MZ4aaSf6IP/0l16LI/Y2yMzY2KMHf4qSg=";
-
-  meta = with lib; {
-    changelog = "https://github.com/flarum/framework/blob/main/CHANGELOG.md";
-    description = "Flarum is a delightfully simple discussion platform for your website";
-    homepage = "https://github.com/flarum/flarum";
-    license = lib.licenses.mit;
-    maintainers = with maintainers; [
-      fsagbuya
-      jasonodoom
-    ];
-  };
-})
--- a/nixbld-etc-nixos/flarum/fof-extensions.patch
+++ b/nixbld-etc-nixos/flarum/fof-extensions.patch
@ -1,16 +0,0 @@
-diff --git a/composer.json b/composer.json
-index c63b5f8..5ad1186 100644
--- a/composer.json
-+++ b/composer.json
-@@ -37,7 +37,10 @@
-         "flarum/sticky": "*",
-         "flarum/subscriptions": "*",
-         "flarum/suspend": "*",
-        "flarum/tags": "*"
-+        "flarum/tags": "*",
-+        "fof/polls": "*",
-+        "fof/subscribed": "*",
-+        "fof/upload": "*"
-     },
-     "config": {
-         "preferred-install": "dist",
--- a/nixbld-etc-nixos/ghbackup-179.patch
+++ b/nixbld-etc-nixos/ghbackup-179.patch
@ -1,61 +0,0 @@
-diff --git a/github_backup/github_backup.py b/github_backup/github_backup.py
-index 4ef8b7e..82cbdca 100644
--- a/github_backup/github_backup.py
-+++ b/github_backup/github_backup.py
-@@ -425,7 +425,7 @@ def get_github_repo_url(args, repository):
-     return repo_url
- 
- 
-def retrieve_data_gen(args, template, query_args=None, single_request=False):
-+def retrieve_data_gen(args, template, query_args=None, single_request=False, optional=False):
-     auth = get_auth(args, encode=not args.as_app)
-     query_args = get_query_args(query_args)
-     per_page = 100
-@@ -452,6 +452,11 @@ def retrieve_data_gen(args, template, query_args=None, single_request=False):
-         else:
-             read_error = False
- 
-+        # Requested data does not exist for this repository, but that was expected.
-+        # Generate an empty list.
-+        if status_code == 404 and optional:
-+            return
-+
-         # be gentle with API request limit and throttle requests if remaining requests getting low
-         limit_remaining = int(r.headers.get('x-ratelimit-remaining', 0))
-         if args.throttle_limit and limit_remaining <= args.throttle_limit:
-@@ -509,8 +514,8 @@ def retrieve_data_gen(args, template, query_args=None, single_request=False):
-             break
- 
- 
-def retrieve_data(args, template, query_args=None, single_request=False):
-    return list(retrieve_data_gen(args, template, query_args, single_request))
-+def retrieve_data(args, template, query_args=None, single_request=False, optional=False):
-+    return list(retrieve_data_gen(args, template, query_args, single_request, optional))
- 
- 
- def get_query_args(query_args=None):
-@@ -1011,7 +1016,8 @@ def backup_hooks(args, repo_cwd, repository, repos_template):
-                      'hooks',
-                      template,
-                      output_file,
-                     hook_cwd)
-+                     hook_cwd,
-+                     optional=not args.include_hooks)
-     except SystemExit:
-         log_info("Unable to read hooks, skipping")
- 
-@@ -1158,12 +1164,12 @@ def backup_account(args, output_directory):
-                      account_cwd)
- 
- 
-def _backup_data(args, name, template, output_file, output_directory):
-+def _backup_data(args, name, template, output_file, output_directory, optional=False):
-     skip_existing = args.skip_existing
-     if not skip_existing or not os.path.exists(output_file):
-         log_info('Retrieving {0} {1}'.format(args.user, name))
-         mkdir_p(output_directory)
-        data = retrieve_data(args, template)
-+        data = retrieve_data(args, template, optional=optional)
- 
-         log_info('Writing {0} {1} to disk'.format(len(data), name))
-         with codecs.open(output_file, 'w', encoding='utf-8') as f:
--- a/nixbld-etc-nixos/gitea-home.tmpl
+++ b/nixbld-etc-nixos/gitea-home.tmpl
@ -3,7 +3,7 @@
 	<div class="ui stackable middle very relaxed page grid">
 		<div class="sixteen wide center aligned centered column">
 			<div>
-				<img class="logo" width="220" height="220" src="{{AssetUrlPrefix}}/img/logo.svg"/>
+				<img class="logo" src="{{AppSubUrl}}/img/gitea-lg.png" />
 			</div>
 			<div class="hero">
 				<h1 class="ui icon header title">
--- a/nixbld-etc-nixos/gitea-signin.tmpl
+++ b/nixbld-etc-nixos/gitea-signin.tmpl
@ -1,11 +0,0 @@
-{{template "base/head" .}}
-<div class="page-content user signin{{if .LinkAccountMode}} icon{{end}}">
-	{{template "user/auth/signin_navbar" .}}
-	<div class="ui middle very relaxed page grid">
-		<div class="ui container column fluid">
-			{{template "user/auth/signin_inner" .}}
-			To get an account (also available to external contributors), simply write to sb@m-***s.hk.
-		</div>
-	</div>
-</div>
-{{template "base/footer" .}}
--- a/nixbld-etc-nixos/github-backup-module.nix
+++ b/nixbld-etc-nixos/github-backup-module.nix
@ -1,67 +0,0 @@
-{ config, pkgs, lib, ... }:
-with lib;
-let
-  python-github-backup = pkgs.python3Packages.buildPythonApplication {
-    name = "python-github-backup";
-    src = pkgs.fetchFromGitHub {
-      owner = "josegonzalez";
-      repo = "python-github-backup";
-      rev = "18e78a4d66120961590836e63d1fa939e4d036f3";
-      sha256 = "1c5qxyv322z5zkx8mxdwdqrnjgqhk00aqcgwkn53b4xkfr2idkbn";
-    };
-    patches = [ ./ghbackup-179.patch ];
-    propagatedBuildInputs = [ pkgs.git ];
-  };
-  token = (import /etc/nixos/secret/github_tokens.nix).backup;
-  makeBackup = pkgs.writeScript "make-ghbackup" ''
-    #!${pkgs.bash}/bin/bash
-
-    set -e
-
-    ${python-github-backup}/bin/github-backup m-labs -t ${token} --all -i -o /var/lib/ghbackup/m-labs
-    ${python-github-backup}/bin/github-backup quartiq -t ${token} --all -i -o /var/lib/ghbackup/quartiq
-    ${python-github-backup}/bin/github-backup sinara-hw -t ${token} --all -i -o /var/lib/ghbackup/sinara-hw
-
-    echo GitHub backup done
-  '';
-
-  cfg = config.services.ghbackup;
-in
-{
-  options.services.ghbackup = {
-    enable = mkOption {
-      type = types.bool;
-      default = false;
-      description = "Enable backups";
-    };
-  };
-
-  config = mkIf cfg.enable {
-    systemd.services.ghbackup = {
-      description = "GitHub backup";
-      serviceConfig = {
-        Type = "oneshot";
-        User = "ghbackup";
-        Group = "ghbackup";
-        ExecStart = "${makeBackup}";
-      };
-    };
-
-    users.users.ghbackup = {
-      name = "ghbackup";
-      group = "ghbackup";
-      description = "GitHub backups user";
-      isSystemUser = true;
-      createHome = true;
-      home = "/var/lib/ghbackup";
-      useDefaultShell = true;
-    };
-    users.extraGroups.ghbackup = {};
-
-    systemd.timers.ghbackup = {
-      description = "GitHub backup";
-      wantedBy = [ "timers.target" ];
-      timerConfig.OnCalendar = "daily";
-    };
-  };
-}
--- a/nixbld-etc-nixos/homu/disable-ssh-host-keycheck.patch
+++ b/nixbld-etc-nixos/homu/disable-ssh-host-keycheck.patch
@ -0,0 +1,13 @@
+diff --git a/homu/git_helper.py b/homu/git_helper.py
+index 0f70c69..f53fb57 100755
+--- a/homu/git_helper.py
+++ b/homu/git_helper.py
+@@ -7,7 +7,7 @@ SSH_KEY_FILE = os.path.join(os.path.dirname(__file__), '../cache/key')
+ 
+ 
+ def main():
+-    args = ['ssh', '-i', SSH_KEY_FILE, '-S', 'none'] + sys.argv[1:]
+    args = ['ssh', '-o', 'StrictHostKeyChecking=no', '-i', SSH_KEY_FILE, '-S', 'none'] + sys.argv[1:]
+     os.execvp('ssh', args)
+ 
+ 
--- a/nixbld-etc-nixos/homu/nixos-module.nix
+++ b/nixbld-etc-nixos/homu/nixos-module.nix
@ -0,0 +1,52 @@
+{ config, pkgs, lib, ... }:
+with lib;
+let
+  homu = pkgs.callPackage ./pkg.nix {};
+  cfg = config.services.homu;
+in
+
+{
+  options.services.homu = {
+    enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Enable the bot";
+    };
+    dbDir = mkOption {
+      type = types.str;
+      default = "/var/db/homu";
+      description = "Path to the database file (use the same path in config.toml)";
+    };
+    config = mkOption {
+      description = "Location of config.toml";
+      type = types.str;
+    };
+  };
+
+  config = mkIf cfg.enable {
+    users.users.homu = {
+      group = "homu";
+      home = cfg.dbDir;
+      createHome = true;
+    };
+    users.groups.homu = {};
+
+    systemd.services.homu = {
+      description = "Homu bot";
+      wantedBy = [ "multi-user.target" ];
+      after    = [ "network.target" ];
+      serviceConfig = {
+        Type = "simple";
+        ExecStart = "${homu}/bin/homu -c ${cfg.config}";
+
+        Restart = "always";
+        RestartSec = "5sec";
+
+        User = "homu";
+        Group = "homu";
+      };
+    };
+  };
+
+}
+  
--- a/nixbld-etc-nixos/homu/patch-cache-directory.patch
+++ b/nixbld-etc-nixos/homu/patch-cache-directory.patch
@ -0,0 +1,26 @@
+diff --git a/homu/git_helper.py b/homu/git_helper.py
+index 0f70c69..732230c 100755
+--- a/homu/git_helper.py
+++ b/homu/git_helper.py
+@@ -3,7 +3,7 @@
+ import sys
+ import os
+ 
+-SSH_KEY_FILE = os.path.join(os.path.dirname(__file__), '../cache/key')
+SSH_KEY_FILE = os.path.expanduser("~/cache/key")
+ 
+ 
+ def main():
+diff --git a/homu/main.py b/homu/main.py
+index 16b60a2..a2e109a 100644
+--- a/homu/main.py
+++ b/homu/main.py
+@@ -649,7 +649,7 @@ def git_push(git_cmd, branch, state):
+ 
+ 
+ def init_local_git_cmds(repo_cfg, git_cfg):
+-    fpath = 'cache/{}/{}'.format(repo_cfg['owner'], repo_cfg['name'])
+    fpath = '{}/cache/{}/{}'.format(os.path.expanduser("~"), repo_cfg['owner'], repo_cfg['name'])
+     url = 'git@github.com:{}/{}.git'.format(repo_cfg['owner'], repo_cfg['name'])  # noqa
+ 
+     if not os.path.exists(SSH_KEY_FILE):
--- a/nixbld-etc-nixos/homu/pkg.nix
+++ b/nixbld-etc-nixos/homu/pkg.nix
@ -0,0 +1,34 @@
+{ python3Packages, python3, fetchFromGitHub, git, openssh }:
+
+let
+  uritemplate_0_2_0 = python3Packages.github3_py.overrideAttrs(oa: rec {
+  	version = "0.2.0";
+  	src = python3Packages.fetchPypi {
+      pname = "uritemplate.py";
+      inherit version;
+      sha256 = "1pfk04pmnysz0383lwzgig8zqlwiv2n4pmq51f0mc60zz1jimq4g";
+    };
+  });
+  github3_py_0_9_6 = python3Packages.github3_py.overrideAttrs(oa: rec {
+    version = "0.9.6";
+    src = python3Packages.fetchPypi {
+      pname = "github3.py";
+      inherit version;
+      sha256 = "1i8xnh586z4kka7pjl7cy08fmzjs14c8jdp8ykb9jjpzsy2xncdq";
+    };
+    propagatedBuildInputs = [ python3Packages.requests uritemplate_0_2_0 ];
+  });
+in
+  python3Packages.buildPythonApplication {
+    name = "homu";
+    src = fetchFromGitHub {
+      owner = "servo";
+      repo = "homu";
+      rev = "2ea53e76ebac3e5fa11bc39054b3cd4c42eff607";
+      sha256 = "1ih7s8zfbpq0qb9vqbxzr0r4s9ff52l4ipr916kwbck3ygliq3r9";
+    };
+    patches = [ ./patch-cache-directory.patch ./disable-ssh-host-keycheck.patch ];
+    postInstall = "chmod 755 $out/${python3.sitePackages}/homu/git_helper.py";
+    propagatedBuildInputs = [ github3_py_0_9_6 git openssh ] ++ (with python3Packages; [ toml jinja2 requests bottle waitress retrying ]);
+    checkPhase = "python -m unittest discover tests -v";
+  }
--- a/nixbld-etc-nixos/hydra-msys2.patch
+++ b/nixbld-etc-nixos/hydra-msys2.patch
@ -1,122 +0,0 @@
-diff --git a/src/root/product-list.tt b/src/root/product-list.tt
-index 4d545b3e..6049c2a6 100644
--- a/src/root/product-list.tt
-+++ b/src/root/product-list.tt
-@@ -162,6 +162,11 @@
-             <img src="[% c.uri_for("/static/images/iso.png") %]" alt="ISO" />
-           </td>
-           <td>ISO-9660 CD/DVD image</td>
-+        [% CASE "msys2" %]
-+          <td>
-+            <img src="[% c.uri_for("/static/images/msys2.svg") %]" alt="MSYS2" width="32" height="32" />
-+          </td>
-+          <td>MSYS2 package</td>
-         [% CASE "binary-dist" %]
-           <td>
-             <img src="[% c.uri_for("/static/images/binary-dist.png") %]" alt="Binary distribution" />
-diff --git a/src/root/static/images/msys2.svg b/src/root/static/images/msys2.svg
-new file mode 100644
-index 00000000..46baff50
--- /dev/null
-+++ b/src/root/static/images/msys2.svg
-@@ -0,0 +1,100 @@
-+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-+<!-- Created with Inkscape (http://www.inkscape.org/) -->
-+
-+<svg
-+   width="36.777081mm"
-+   height="36.777081mm"
-+   viewBox="0 0 36.77708 36.777081"
-+   version="1.1"
-+   id="svg8"
-+   inkscape:version="1.1.1 (3bf5ae0d25, 2021-09-20)"
-+   sodipodi:docname="msys2_logo.svg"
-+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-+   xmlns="http://www.w3.org/2000/svg"
-+   xmlns:svg="http://www.w3.org/2000/svg"
-+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-+   xmlns:cc="http://creativecommons.org/ns#"
-+   xmlns:dc="http://purl.org/dc/elements/1.1/">
-+  <defs
-+     id="defs2" />
-+  <sodipodi:namedview
-+     id="base"
-+     pagecolor="#ffffff"
-+     bordercolor="#666666"
-+     borderopacity="1.0"
-+     inkscape:pageopacity="0.0"
-+     inkscape:pageshadow="2"
-+     inkscape:zoom="3.959798"
-+     inkscape:cx="121.34457"
-+     inkscape:cy="27.274119"
-+     inkscape:document-units="mm"
-+     inkscape:current-layer="layer1"
-+     showgrid="false"
-+     fit-margin-top="0"
-+     fit-margin-left="0"
-+     fit-margin-right="0"
-+     fit-margin-bottom="0"
-+     inkscape:window-width="2560"
-+     inkscape:window-height="1371"
-+     inkscape:window-x="0"
-+     inkscape:window-y="32"
-+     inkscape:window-maximized="1"
-+     inkscape:pagecheckerboard="true" />
-+  <metadata
-+     id="metadata5">
-+    <rdf:RDF>
-+      <cc:Work
-+         rdf:about="">
-+        <dc:format>image/svg+xml</dc:format>
-+        <dc:type
-+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-+      </cc:Work>
-+    </rdf:RDF>
-+  </metadata>
-+  <g
-+     inkscape:label="Layer 1"
-+     inkscape:groupmode="layer"
-+     id="layer1"
-+     transform="translate(-122.70998,-169.48973)">
-+    <rect
-+       style="fill:#894c84;fill-opacity:1;stroke-width:0"
-+       id="rect946"
-+       width="36.777081"
-+       height="36.777081"
-+       x="122.70998"
-+       y="169.48973" />
-+    <path
-+       style="fill:#d35e64;fill-opacity:1;stroke-width:0.133635"
-+       d="m 142.72948,201.89184 c -0.32408,-0.25492 -0.35455,-0.35395 -0.3187,-1.03567 l 0.0396,-0.75379 h 0.45908 c 0.44506,0 0.45934,0.0163 0.46772,0.53453 l 0.009,0.53454 0.70308,0.0405 c 0.53885,0.031 0.7217,-0.008 0.78281,-0.16735 0.15971,-0.41619 -0.10726,-0.89779 -0.98636,-1.77935 -0.49365,-0.49504 -1.03351,-1.07713 -1.19967,-1.29353 -0.38599,-0.50269 -0.40844,-1.38334 -0.0467,-1.83013 0.23417,-0.28918 0.35554,-0.31548 1.45595,-0.31548 1.36938,0 1.67817,0.15986 1.80376,0.93383 0.11523,0.71006 -0.0673,1.20433 -0.44479,1.20433 -0.26632,0 -0.34178,-0.0979 -0.46372,-0.60136 -0.13305,-0.54937 -0.1843,-0.60509 -0.59283,-0.64461 -0.24596,-0.0238 -0.58921,-0.008 -0.76279,0.036 -0.59536,0.14942 -0.37642,0.57816 0.95393,1.86806 l 1.26953,1.23092 v 0.90178 c 0,1.37811 -0.0436,1.41874 -1.52348,1.41874 -1.06598,0 -1.29877,-0.0409 -1.60514,-0.28187 z"
-+       id="path3828"
-+       inkscape:connector-curvature="0" />
-+    <path
-+       style="fill:#d35e64;fill-opacity:1;stroke-width:0.133635"
-+       d="m 148.05027,204.08841 c 0.0471,-0.28134 0.11947,-1.05275 0.16076,-1.71424 0.0703,-1.12643 0.0353,-1.35529 -0.55133,-3.60814 -0.34453,-1.32299 -0.6573,-2.54073 -0.69504,-2.70611 -0.0594,-0.26014 -0.0147,-0.30067 0.33149,-0.30067 0.22006,0 0.46737,0.081 0.54957,0.18007 0.0822,0.099 0.30254,0.86578 0.48964,1.70385 0.41743,1.86975 0.45345,1.99148 0.58914,1.99148 0.15912,0 0.35622,-0.563 0.74822,-2.13717 0.38958,-1.56447 0.48518,-1.73823 0.9564,-1.73823 0.39274,0 0.46132,-0.43504 -0.70121,4.4477 -0.46869,1.96849 -0.93011,3.74249 -1.02539,3.94223 -0.11781,0.24694 -0.29559,0.37716 -0.55559,0.40696 -0.37406,0.0429 -0.38048,0.0327 -0.29666,-0.46773 z"
-+       id="path3830"
-+       inkscape:connector-curvature="0" />
-+    <path
-+       style="fill:#d35e64;fill-opacity:1;stroke-width:0.133635"
-+       d="m 155.37958,199.87478 -0.001,1.04324 c 0,0 0.0415,0.99571 -0.10812,1.13694 -0.15218,0.14363 -0.72994,0.11875 -1.5324,0.11875 -1.39413,0 -1.4684,-0.0143 -1.66996,-0.32193 -0.14282,-0.21797 -0.19775,-0.55241 -0.17012,-1.03567 0.0397,-0.69411 0.0518,-0.71373 0.43989,-0.71373 0.2965,0 0.40947,0.0687 0.43951,0.26726 0.13121,0.86712 0.13264,0.86863 0.81803,0.86863 1.33065,0 1.18669,-0.7429 -0.41998,-2.16732 -0.98712,-0.87515 -1.3045,-1.34704 -1.30163,-1.93531 0.005,-1.02426 0.44219,-1.37639 1.70885,-1.37639 1.4449,0 1.89746,0.36739 1.89746,1.54037 0,0.85 -0.80733,1.01376 -0.94108,0.1909 -0.113,-0.69515 -0.21979,-0.79583 -0.84414,-0.79583 -0.59087,0 -0.88668,0.17572 -0.88861,0.52786 -5.3e-4,0.11392 0.5857,0.76291 1.30294,1.44221"
-+       id="path3832"
-+       inkscape:connector-curvature="0"
-+       sodipodi:nodetypes="ccssccscsccsssscc" />
-+    <path
-+       inkscape:connector-curvature="0"
-+       id="path3826"
-+       d="m 125.15872,195.23965 c -0.30592,-0.19939 -0.0836,-0.86189 0.8607,-2.56497 1.58255,-2.85415 5.22198,-10.62008 6.75854,-14.42159 0.91204,-2.25643 0.98557,-2.83541 0.41825,-3.29345 -0.30201,-0.24384 -0.34148,-0.33999 -0.22153,-0.53956 0.44174,-0.73497 2.98816,-1.05046 4.06353,-0.50346 1.1982,0.60947 1.74884,2.08184 2.47139,6.60826 0.57628,3.61017 1.00176,6.0369 1.0809,6.16495 0.21334,0.34519 0.63685,-0.49885 2.24466,-4.47355 2.25297,-5.56961 3.24559,-7.35862 4.41748,-7.9617 0.51912,-0.26714 0.89922,-0.34492 1.8995,-0.38866 1.60332,-0.0701 1.6509,-0.0327 1.64898,1.29653 -0.002,1.7237 -0.0807,1.96599 -0.76359,2.3662 -1.27599,0.74779 -2.16809,2.00702 -2.17,3.06305 -0.003,1.44987 1.07869,1.89961 2.0727,0.86208 0.20781,-0.2169 0.42671,-0.39436 0.48646,-0.39436 0.0597,0 0.10898,0.55626 0.10941,1.23612 5.2e-4,0.67987 0.0579,1.58514 0.12779,2.01171 0.14392,0.87871 0.16421,0.83597 -1.8354,3.86646 -1.11067,1.68327 -1.20806,1.92146 -0.90836,2.22164 0.18169,0.18198 0.60193,0.22609 2.48831,0.26119 l 2.26971,0.0422 0.55893,0.7403 c 0.68294,0.90455 0.72637,1.39945 0.1851,2.10909 -0.49391,0.64756 -1.48498,1.35585 -2.16303,1.54588 -0.98995,0.27744 -2.22523,-0.26803 -3.29926,-1.45686 -1.37797,-1.52525 -1.99486,-3.94203 -2.17991,-8.54021 -0.0642,-1.59436 -0.13883,-2.29481 -0.24099,-2.26075 -0.0814,0.0271 -0.99576,2.00431 -2.03189,4.39371 -3.28691,7.57995 -3.68415,8.28612 -4.54018,8.07127 -0.53578,-0.13448 -1.34919,-1.06203 -1.9102,-2.17825 -1.10951,-2.20757 -1.73511,-5.05031 -2.03723,-9.25721 -0.0871,-1.21273 -0.20858,-2.26094 -0.26996,-2.32935 -0.13588,-0.15144 -0.58442,0.82294 -2.08397,4.52711 -2.01481,4.97699 -2.79643,6.54288 -3.82036,7.65371 -0.87044,0.94432 -3.13721,1.88044 -3.68648,1.52243 z"
-+       style="fill:#f9f9f9;stroke-width:0.133635" />
-+    <g
-+       id="g957"
-+       transform="translate(36.843901,36.777081)"
-+       style="fill:#999999">
-+      <path
-+         style="fill:#999999;fill-opacity:1;stroke-width:0.264583"
-+         d="m 118.48002,154.38963 c -0.21263,-0.77937 -0.60053,-0.53763 -3.77862,-0.53763 -4.23812,0 -4.51001,0.21718 -2.65413,-2.44723 2.45703,-3.52744 3.4906,-5.92399 2.80851,-6.96499 -0.4719,-0.72022 -1.01247,-0.62449 -1.92709,0.34127 -0.84859,0.89603 -1.86894,0.41779 -1.86894,-0.95587 0,-2.01205 2.80561,-3.99992 5.38938,-3.9922 1.61399,0.005 2.43642,0.4039 3.21581,1.56044 1.12027,1.66236 0.73145,3.8557 -1.134,6.39695 -1.54383,2.10311 -0.73385,3.61259 0.95572,1.78109 1.46292,-1.68793 1.55952,0.86073 1.49098,1.70283 -0.2309,2.69619 -2.07701,4.65709 -2.49762,3.11534 z"
-+         id="path961"
-+         inkscape:connector-curvature="0"
-+         sodipodi:nodetypes="sscccscccccs" />
-+    </g>
-+  </g>
-+</svg>
--- a/nixbld-etc-nixos/hydra-restrictdist.patch
+++ b/nixbld-etc-nixos/hydra-restrictdist.patch
@ -1,32 +0,0 @@
-diff --git src/lib/Hydra/Controller/Root.pm src/lib/Hydra/Controller/Root.pm
-index a9b0d558..71869ba0 100644
--- a/src/lib/Hydra/Controller/Root.pm
-+++ b/src/lib/Hydra/Controller/Root.pm
-@@ -19,6 +19,11 @@ use Net::Prometheus;
- # Put this controller at top-level.
- __PACKAGE__->config->{namespace} = '';
- 
-+sub isRedistRestricted {
-+  my ($path) = @_;
-+
-+  return index($path, "-RESTRICTDIST-") >= 0;
-+}
- 
- sub noLoginNeeded {
-   my ($c) = @_;
-@@ -319,6 +324,7 @@ sub nar :Local :Args(1) {
-         $path = $Nix::Config::storeDir . "/$path";
- 
-         gone($c, "Path " . $path . " is no longer available.") unless isValidPath($path);
-+        notFound($c, "Redistribution restricted") if isRedistRestricted($path);
- 
-         $c->stash->{current_view} = 'NixNAR';
-         $c->stash->{storePath} = $path;
-@@ -368,6 +374,7 @@ sub narinfo :LocalRegex('^([a-z0-9]+).narinfo$') :Args(0) {
-             setCacheHeaders($c, 60 * 60);
-             return;
-         }
-+        notFound($c, "Redistribution restricted") if isRedistRestricted($path);
- 
-         $c->stash->{storePath} = $path;
-         $c->forward('Hydra::View::NARInfo');
--- a/nixbld-etc-nixos/hydra-retry.patch
+++ b/nixbld-etc-nixos/hydra-retry.patch
@ -0,0 +1,19 @@
+commit 86bf81c0b8a51bffa4b4b566e1caaac6f0e041d3
+Author: Sebastien Bourdeauducq <sb@m-labs.hk>
+Date:   Thu Mar 14 17:45:32 2019 +0800
+
+    add option to disable retries on transient failures
+
+diff --git a/src/hydra-queue-runner/build-remote.cc b/src/hydra-queue-runner/build-remote.cc
+index 69c430eb..bdbc808d 100644
+--- a/src/hydra-queue-runner/build-remote.cc
+++ b/src/hydra-queue-runner/build-remote.cc
+@@ -344,7 +344,7 @@ void State::buildRemote(ref<Store> destStore,
+                     break;
+                 case BuildResult::TransientFailure:
+                     result.stepStatus = bsFailed;
+-                    result.canRetry = true;
+                    result.canRetry = get(step->drv->env, "__hydraRetry").value_or("1") == "1";
+                     result.errorMsg = "";
+                     break;
+                 case BuildResult::TimedOut:
--- a/nixbld-etc-nixos/hydra-unbreak-sysbuild.patch
+++ b/nixbld-etc-nixos/hydra-unbreak-sysbuild.patch
@ -0,0 +1,25 @@
+diff --git a/src/lib/Hydra/Schema/Builds.pm b/src/lib/Hydra/Schema/Builds.pm
+index d4334300..014d07ce 100644
+--- a/src/lib/Hydra/Schema/Builds.pm
+++ b/src/lib/Hydra/Schema/Builds.pm
+@@ -608,6 +608,7 @@ makeQueries('', "");
+ makeQueries('ForProject', "and project = ?");
+ makeQueries('ForJobset', "and jobset_id = ?");
+ makeQueries('ForJob', "and jobset_id = ? and job = ?");
+makeQueries('ForJobName', "and jobset_id = (select id from jobsets j where j.name = ?) and job = ?");
+ 
+ 
+ my %hint = (
+diff --git a/src/script/hydra-eval-jobset b/src/script/hydra-eval-jobset
+index ea336bfc..2f208418 100755
+--- a/src/script/hydra-eval-jobset
+++ b/src/script/hydra-eval-jobset
+@@ -142,7 +142,7 @@ sub fetchInputSystemBuild {
+     $projectName ||= $project->name;
+     $jobsetName ||= $jobset->name;
+ 
+-    my @latestBuilds = $db->resultset('LatestSucceededForJob')
+    my @latestBuilds = $db->resultset('LatestSucceededForJobName')
+         ->search({}, {bind => [$jobsetName, $jobName]});
+ 
+     my @validBuilds = ();
--- a/nixbld-etc-nixos/named/193thz.com
+++ b/nixbld-etc-nixos/named/193thz.com
@ -1,29 +0,0 @@
-$TTL 7200
-
-@						SOA	ns.193thz.com. sb.m-labs.hk. (
-							2024060201
-							7200
-							3600
-							86400
-							600)
-
-
-						NS		ns.193thz.com.
-						NS		ns1.he.net.
-
-						A		94.190.212.123
-						A		202.77.7.238
-						AAAA	2001:470:18:390::2
-						MX		10 mail.m-labs.hk.
-						TXT		"v=spf1 mx a:router.alt.m-labs.hk -all"
-						TXT		"google-site-verification=5eIjLyhM_siRg5Fc2Z3AMSbheH0JFOn5iR3TCEXakqU"
-						CAA		0 issue "letsencrypt.org; accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1758987512"
-
-
-ns						A		94.190.212.123
-ns						AAAA	2001:470:18:390::2
-
-mail._domainkey			TXT	"v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC9T0cONxGXeyETE0bJ6NJVGT58fVFrfb+WxQhMskCN/mJhODyDTkRCjzE8ZnKhZGjkFZNG+PoSZlW+kpSS1LvMwzQpMRaH4zAzIexffR0l7rJR1MuQiVMsfGWpO2SLEuN74L2qH8SUBHZjrRpeSaFxwQm+prIOzZe5wTZStt/6qQIDAQAB"
-_dmarc					TXT	"v=DMARC1; p=none"
-
-www						CNAME	@
--- a/nixbld-etc-nixos/named/200-29.98.206.103.in-addr.arpa
+++ b/nixbld-etc-nixos/named/200-29.98.206.103.in-addr.arpa
@ -1,20 +0,0 @@
-$TTL 7200
-
-@						SOA	NS.XN--WBTZ5WPQAJ35CFXC.XN--J6W193G. sb.m-labs.hk. (
-							2024060201
-							7200
-							3600
-							86400
-							600)
-
-
-						NS		NS.XN--WBTZ5WPQAJ35CFXC.XN--J6W193G.
-						NS		ns1.he.net.
-						CAA		0 issue "letsencrypt.org; accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1758987512"
-
-200	PTR	router.alt.m-labs.hk.
-201	PTR	stewardship1.alt.m-labs.hk.
-202	PTR	stewardship2.alt.m-labs.hk.
-203	PTR	atse.alt.m-labs.hk.
-204	PTR	nasty-gareth.alt.m-labs.hk.
-205	PTR	zynq.alt.m-labs.hk.
--- a/nixbld-etc-nixos/named/m-labs-intl.com
+++ b/nixbld-etc-nixos/named/m-labs-intl.com
@ -1,30 +0,0 @@
-$TTL 7200
-
-@						SOA	ns.m-labs-intl.com. sb.m-labs.hk. (
-							2024101401
-							7200
-							3600
-							86400
-							600)
-
-
-						NS		ns.m-labs-intl.com.
-						NS		ns1.he.net.
-						NS		ns1.qnetp.net.
-
-						A		5.78.86.156
-						AAAA	2a01:4ff:1f0:83de::1
-						MX		10 mail.m-labs-intl.com.
-						TXT		"v=spf1 mx -all"
-						TXT		"google-site-verification=BlQd5_5wWW7calKC7bZA0GdoxR8-zj4gwJEg9sGJ3l8"
-						CAA		0 issue "letsencrypt.org; accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1768317117"
-
-ns						A		94.190.212.123
-ns						AAAA	2001:470:18:390::2
-
-mail					A		5.78.86.156
-mail._domainkey			IN	TXT	"v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDJVPuhSGXghO7ib8Em/Se3jfCCIJK5g4zn5pGZ3/e0I0f+zGHMuvwpjkAKf6eSmo/AAXEaco28pDi3qE5xfV512AJsORCfPoPFyNhLsj/qtri6hc5KVSWW0Ja3MSFBINDCaX78c7PXPY+3jJJGpwSBDLjdxj9AQwtfiCVlH4qE/QIDAQAB"
-_dmarc					TXT		"v=DMARC1; p=none"
-
-www						CNAME	@
-hooks					CNAME	@
--- a/nixbld-etc-nixos/named/m-labs.hk
+++ b/nixbld-etc-nixos/named/m-labs.hk
@ -1,53 +0,0 @@
-$TTL 7200
-
-@						SOA	NS.XN--WBTZ5WPQAJ35CFXC.XN--J6W193G. sb.m-labs.hk. (
-							2024080501
-							7200
-							3600
-							86400
-							600)
-
-
-						NS		NS.XN--WBTZ5WPQAJ35CFXC.XN--J6W193G.
-						NS		ns1.qnetp.net.
-						NS		ns1.he.net.
-
-						A		94.190.212.123
-						A		202.77.7.238
-						AAAA	2001:470:18:390::2
-						MX		10 mail.m-labs.hk.
-						TXT		"v=spf1 mx a:router.alt.m-labs.hk -all"
-						TXT		"google-site-verification=Tf_TEGZLG7-2BE70hMjLnzjDZ1qUeUZ6vxzbl1sagT8"
-						CAA		0 issue "letsencrypt.org; accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1758987512"
-
-
-mail					A		94.190.212.123
-mail					A		202.77.7.238
-mail					AAAA	2001:470:18:390::2
-mail._domainkey			TXT		"v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCl38A/Z0IInVU157qzrWgMfYm2iDHoWZsTyiiOoZdT7kHMzS/M2OMXMt7r5g1/7pCPClsGUDJvKGqVMmjJuPleMyKHwpGeT92qDNEFpt6ahneap/oYx5eBYM/vGcgmleNxyIoBHsptaZvqD4vCEFaC22f8UL5QAgQD3wCH3FwlpQIDAQAB"
-_dmarc					TXT		"v=DMARC1; p=none"
-
-lab						CNAME	@
-www						CNAME	@
-nixbld					CNAME	@
-msys2					CNAME	@
-conda					CNAME	@
-afws					CNAME	@
-git						CNAME	@
-chat					CNAME	@
-hooks					CNAME	@
-forum					CNAME	@
-perso					CNAME	@
-rt						CNAME	@
-files					CNAME	@
-docs					CNAME	@
-
-rpi-1					AAAA	2001:470:f891:1:dea6:32ff:fe8a:6a93
-rpi-4					AAAA	2001:470:f891:1:dea6:32ff:fe14:fce9
-
-router.alt				A		103.206.98.200
-stewardship1.alt		A		103.206.98.201
-stewardship2.alt		A		103.206.98.202
-atse.alt				A		103.206.98.203
-nasty-gareth.alt		A		103.206.98.204
-zynq.alt				A		103.206.98.205
--- a/nixbld-etc-nixos/named/m-labs.ph
+++ b/nixbld-etc-nixos/named/m-labs.ph
@ -1,28 +0,0 @@
-$TTL 7200
-
-@						SOA	ns1.m-labs.ph. sb.m-labs.hk. (
-							2024060201
-							7200
-							3600
-							86400
-							600)
-
-
-						NS		ns1.m-labs.ph.
-						NS		ns1.he.net.
-
-						A		94.190.212.123
-						A		202.77.7.238
-						AAAA	2001:470:18:390::2
-						MX		10 mail.m-labs.hk.
-						TXT		"v=spf1 mx a:router.alt.m-labs.hk -all"
-						TXT		"google-site-verification=g2k8M1fhbYOPs4C37SeGCfNlD6paWcexamji1DXrp0o"
-						CAA		0 issue "letsencrypt.org; accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1758987512"
-
-ns1						A		94.190.212.123
-ns1						AAAA	2001:470:18:390::2
-
-mail._domainkey			TXT		"v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDPUlkoA4Gucsin6P5LSohSOpPbpOELkbKDz9MmB4Zzj4QdcQNtMzU3Uis8WZwVXknQ/6URoDdTa4aR8+PwMi5fjKpLM8ZAnnHJHYebZPDRq6lQo3VGdaCu9NhdjYwFhvK9VRyhwI9i7DUptdLsu/OzbgTlCdWQTOr+MFEkYwmxLQIDAQAB"
-_dmarc					TXT		"v=DMARC1; p=none"
-
-www						CNAME	@
--- a/nixbld-etc-nixos/named/malloctech.fr
+++ b/nixbld-etc-nixos/named/malloctech.fr
@ -1,23 +0,0 @@
-$TTL 7200
-
-@						SOA	ns.malloctech.fr. sb.m-labs.hk. (
-							2024060201
-							7200
-							3600
-							86400
-							600)
-
-
-						NS		ns.malloctech.fr.
-						NS		ns1.he.net.
-
-						MX		10 mail.m-labs.hk.
-						TXT		"v=spf1 mx a:router.alt.m-labs.hk -all"
-						TXT		"google-site-verification=LALF-fafTnmkL-18m3CzwFjSwEV1C7NeKexiNfMYsOw"
-						CAA		0 issue "letsencrypt.org; accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1758987512"
-
-ns						A		94.190.212.123
-ns						AAAA	2001:470:18:390::2
-
-mail._domainkey			TXT	"v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC+Op2B9cdVxwyweChOBJtk4LGkLUfxunI3a7sSL0aVnntfPWkKgY7zTL8iOJaqdt/DkkvOz++HEsn3AzleXsdibaTC9x6kgrMVgkrsYOKA4bWDLJiUfgq7vvRMdkw6rOqlJp9+faXKIKwtMG9Ckd1+rHBsaFwe7EE0coLbhGZaQQIDAQAB"
-_dmarc					TXT	"v=DMARC1; p=none"
--- a/nixbld-etc-nixos/nix-networked-derivations.patch
+++ b/nixbld-etc-nixos/nix-networked-derivations.patch
@ -1,80 +0,0 @@
-diff --git a/src/libstore/build/local-derivation-goal.cc b/src/libstore/build/local-derivation-goal.cc
-index 763045a80..d7c5cc82e 100644
--- a/src/libstore/build/local-derivation-goal.cc
-+++ b/src/libstore/build/local-derivation-goal.cc
-@@ -190,6 +190,8 @@ void LocalDerivationGoal::tryLocalBuild()
- 
-     assert(derivationType);
- 
-+    networked = parsedDrv->getBoolAttr("__networked");
-+
-     /* Are we doing a chroot build? */
-     {
-         auto noChroot = parsedDrv->getBoolAttr("__noChroot");
-@@ -207,7 +209,7 @@ void LocalDerivationGoal::tryLocalBuild()
-         else if (settings.sandboxMode == smDisabled)
-             useChroot = false;
-         else if (settings.sandboxMode == smRelaxed)
-            useChroot = derivationType->isSandboxed() && !noChroot;
-+            useChroot = !networked && derivationType->isSandboxed() && !noChroot;
-     }
- 
-     auto & localStore = getLocalStore();
-@@ -717,7 +719,7 @@ void LocalDerivationGoal::startBuilder()
-                 "nogroup:x:65534:\n", sandboxGid()));
- 
-         /* Create /etc/hosts with localhost entry. */
-        if (derivationType->isSandboxed())
-+        if (!networked && derivationType->isSandboxed())
-             writeFile(chrootRootDir + "/etc/hosts", "127.0.0.1 localhost\n::1 localhost\n");
- 
-         /* Make the closure of the inputs available in the chroot,
-@@ -921,7 +923,7 @@ void LocalDerivationGoal::startBuilder()
-            us.
-         */
- 
-        if (derivationType->isSandboxed())
-+        if (!networked && derivationType->isSandboxed())
-             privateNetwork = true;
- 
-         userNamespaceSync.create();
-@@ -1160,7 +1162,7 @@ void LocalDerivationGoal::initEnv()
-        to the builder is generally impure, but the output of
-        fixed-output derivations is by definition pure (since we
-        already know the cryptographic hash of the output). */
-    if (!derivationType->isSandboxed()) {
-+    if (networked || !derivationType->isSandboxed()) {
-         for (auto & i : parsedDrv->getStringsAttr("impureEnvVars").value_or(Strings()))
-             env[i] = getEnv(i).value_or("");
-     }
-@@ -1829,7 +1831,7 @@ void LocalDerivationGoal::runChild()
-             /* Fixed-output derivations typically need to access the
-                network, so give them access to /etc/resolv.conf and so
-                on. */
-            if (!derivationType->isSandboxed()) {
-+            if (networked || !derivationType->isSandboxed()) {
-                 // Only use nss functions to resolve hosts and
-                 // services. Don’t use it for anything else that may
-                 // be configured for this system. This limits the
-@@ -2071,7 +2073,7 @@ void LocalDerivationGoal::runChild()
-                 #include "sandbox-defaults.sb"
-                 ;
- 
-            if (!derivationType->isSandboxed())
-+            if (networked || !derivationType->isSandboxed())
-                 sandboxProfile +=
-                     #include "sandbox-network.sb"
-                     ;
-diff --git a/src/libstore/build/local-derivation-goal.hh b/src/libstore/build/local-derivation-goal.hh
-index 86b86c01e..95b03aae8 100644
--- a/src/libstore/build/local-derivation-goal.hh
-+++ b/src/libstore/build/local-derivation-goal.hh
-@@ -82,6 +82,8 @@ struct LocalDerivationGoal : public DerivationGoal
-      */
-     Path chrootRootDir;
- 
-+    bool networked;
-+
-     /**
-      * RAII object to delete the chroot directory.
-      */
--- a/nixbld-etc-nixos/rfq/src/rfq/init.py
+++ b/nixbld-etc-nixos/rfq/src/rfq/init.py
@ -14,13 +14,6 @@ from werkzeug.middleware.proxy_fix import ProxyFix

 load_dotenv()

-mail_password_file = getenv("FLASK_MAIL_PASSWORD_FILE")
-if mail_password_file is not None:
-    with open(mail_password_file, "r") as f:
-        mail_password = f.read().strip()
-else:
-    mail_password = None
-
 app = Flask(__name__)
 app.config.update(
    DEBUG=getenv("FLASK_DEBUG") == "True",
@ -29,7 +22,7 @@ app.config.update(
    MAIL_USE_SSL=getenv("FLASK_MAIL_USE_SSL"),
    MAIL_DEBUG=False,
    MAIL_USERNAME=getenv("FLASK_MAIL_USERNAME"),
-    MAIL_PASSWORD=mail_password,
+    MAIL_PASSWORD=getenv("FLASK_MAIL_PASSWORD"),
    MAIL_RECIPIENT=getenv("FLASK_MAIL_RECIPIENT"),
    MAIL_SENDER=getenv("FLASK_MAIL_SENDER")
 )
--- a/nixbld-etc-nixos/rfq/uwsgi-config.nix
+++ b/nixbld-etc-nixos/rfq/uwsgi-config.nix
@ -7,13 +7,13 @@ in {
  pythonPackages = self: [ pkg ];
  module = "rfq:app";
  env = [
-    "FLASK_MAIL_SERVER=mail.m-labs.hk"
+    "FLASK_MAIL_SERVER=ssl.serverraum.org"
    "FLASK_MAIL_PORT=465"
    "FLASK_MAIL_USE_SSL=True"
-    "FLASK_MAIL_USERNAME=sysop@m-labs.hk"
-    "FLASK_MAIL_PASSWORD_FILE=/etc/nixos/secret/rfqpassword"
+    "FLASK_MAIL_USERNAME=sales@m-labs.hk"
+    "FLASK_MAIL_PASSWORD=${import /etc/nixos/secret/sales_password.nix}"
    "FLASK_MAIL_RECIPIENT=sales@m-labs.hk"
-    "FLASK_MAIL_SENDER=sysop@m-labs.hk"
+    "FLASK_MAIL_SENDER=sales@m-labs.hk"
  ];
  socket = "${config.services.uwsgi.runDir}/uwsgi-rfq.sock";
  # allow access from nginx
--- a/nixbld-etc-nixos/rt-session.patch
+++ b/nixbld-etc-nixos/rt-session.patch
@ -1,11 +0,0 @@
-diff '--color=auto' -Naur rt-5.0.1/lib/RT/Interface/Web.pm rtpatched/lib/RT/Interface/Web.pm
--- rt-5.0.1/lib/RT/Interface/Web.pm	1970-01-01 08:00:01.000000000 +0800
-+++ rtpatched/lib/RT/Interface/Web.pm	2021-08-12 13:34:08.870669968 +0800
-@@ -948,6 +948,7 @@
-         -path     => RT->Config->Get('WebPath'),
-         -secure   => ( RT->Config->Get('WebSecureCookies') ? 1 : 0 ),
-         -httponly => ( RT->Config->Get('WebHttpOnlyCookies') ? 1 : 0 ),
-+        -expires => '+6M',
-     );
- 
-     $HTML::Mason::Commands::r->err_headers_out->{'Set-Cookie'} = $cookie->as_string;
--- a/nixbld-etc-nixos/rt.nix
+++ b/nixbld-etc-nixos/rt.nix
@ -1,298 +0,0 @@
-# based on https://gist.github.com/ajs124/ff04ab14435908d914cf5cedbc56a52e
-{ config, lib, pkgs, ... }:
-
-with lib;
-let
-  cfg = config.services.rt;
-
-  configFile = pkgs.writeTextFile {
-    name = "RT_SiteConfig.pm";
-    text = ''
-      use utf8;
-
-      # System (Base configuration)
-      Set($rtname, '${cfg.rtName}'); # Changing this will break responses to existing tickets
-      Set($Organization, '${cfg.organization}'); # Changing this will break all existing tickets
-      Set($CorrespondAddress, '${cfg.correspondAddress}');
-      Set($CommentAddress, '${cfg.commentAddress}');
-      Set($WebDomain, '${cfg.domain}');
-      Set($Timezone, '${cfg.timeZone}');
-
-      Set($DatabaseType, 'Pg');
-      Set($DatabaseHost, '/run/postgresql');
-      Set($DatabaseUser, 'rt');
-      Set($DatabaseName, 'rt5');
-
-      # System (Logging)
-      Set($LogToSTDERR, undef); # Don't log twice
-
-      # System (Incoming mail gateway)
-      Set($OwnerEmail, '${cfg.ownerEmail}');
-      Set($MaxAttachmentSize, 15360000);
-      Set($CheckMoreMSMailHeaders, 1);
-      Set($RTAddressRegexp, '^(helpdesk)\@(m-labs.hk|m-labs-intl.com)$');
-      Set($LoopsToRTOwner, 0);
-
-      # System (Outgoing mail)
-      Set($SetOutgoingMailFrom, 'helpdesk@m-labs.hk');
-
-      # System (Sendmail configuration)
-      Set($SendmailPath, '${cfg.sendmailPath}');
-      Set($SendmailArguments, '${concatStringsSep " " cfg.sendmailArguments}');
-
-      # System (Application logic)
-      Set($ParseNewMessageForTicketCcs, 1);
-
-      # System (Extra Security)
-      Set($RestrictLoginReferrer, 1);
-
-      # System (Date and time handling)
-      Set($DefaultTimeUnitsToHours, 1);
-      Set($TimeInICal, 1);
-      Set($DateTimeFormat, 'RFC2822');
-
-      # System (Authorization and user configuration)
-      Set($AutoLogoff, 262800); # 6 months
-      Set($WebSecureCookies, 1);
-
-      # Web Interface (Base configuration)
-      Set($CanonicalizeRedirectURLs, 1);
-      Set($CanonicalizeURLsInFeeds, 1);
-      Set($WebBaseURL, '${cfg.baseUrl}');
-      Set($LogoLinkURL, '${cfg.baseUrl}');
-
-      # Web Interface (Home page)
-      Set($DefaultSummaryRows, 50);
-
-      # Web Interface (Ticket search)
-      Set($DefaultSearchResultOrder, 'DESC'); # Display newer tickets first
-      Set($SearchResultsAutoRedirect, 1); # Don't show result list when there is only one match
-      Set(%FullTextSearch,
-          Enable => 1,
-          Indexed => 1,
-          Column => 'ContentIndex',
-          Table => 'AttachmentsIndex',
-      );
-
-      # Web Interface (Ticket options)
-      Set($ShowMoreAboutPrivilegedUsers, 1);
-      Set($MoreAboutRequestorGroupsLimit, undef);
-      Set($HideUnsetFieldsOnDisplay, 1);
-
-      # Web Interface (Articles)
-      Set($ArticleOnTicketCreate, 0);
-
-      # Web Interface (Message box properties)
-      Set($MessageBoxRichText, 0);
-      Set($MessageBoxIncludeSignatureOnComment, 0);
-
-      # Web Interface (Transaction display)
-      Set($MaxInlineBody, 0);
-      Set($SuppressInlineTextFiles, 1);
-
-      # Web Interface (Administrative interface)
-      Set($ShowRTPortal, 0);
-      Set($ShowEditSsytemConfig, 0);
-
-      # Features (External storage)
-      Set(%ExternalStorage,
-          Type => 'Disk',
-          Path => '/var/lib/rt/attachments',
-      );
-      Set($ExternalStorageCutoffSize, 0);
-
-      # Features (Cryptography)
-      Set(%Crypt, RejectOnMissingPrivateKey => 0, RejectOnBadData => 0, AllowEncryptDataInDB => 0);
-      Set(%SMIME, Enable => 1, Keyring => '${pkgs.cacert}/etc/ssl/certs/');
-      Set(%GnuPG, Enable => 1);
-      Set(%GnuPGOptions,
-        'keyserver' => 'hkp://keys.openpgp.org',
-        'always-trust' => undef,
-        'auto-key-locate' => 'keyserver',
-        'keyserver-options' => 'auto-key-retrieve'
-      );
-
-      ${cfg.extraConfig}
-
-      1;
-    '';
-    checkPhase = ''
-      ${pkgs.perl}/bin/perl -c $out
-    '';
-  };
-in {
-  options.services.rt = with types; {
-
-    enable = mkEnableOption "rt system";
-
-    package = mkOption {
-      description = "Package to use";
-      default = pkgs.rt;
-      defaultText = "pkgs.rt";
-      type = package;
-    };
-
-    baseUrl = mkOption {
-      description = "Base URL for web interface";
-      default = "https://${cfg.domain}";
-      defaultText = "https://\${cfg.domain}";
-      type = str;
-    };
-
-    commentAddress = mkOption {
-      description = "Default address from/to which comments are sent";
-      type = str;
-    };
-
-    correspondAddress = mkOption {
-      description = "Default address from/to which correspondences are sent";
-      type = str;
-    };
-
-    domain = mkOption {
-      description = "Which domain RT is running on";
-      type = str;
-    };
-
-    ownerEmail = mkOption {
-      description = "Address of a human who manages RT. RT will send errors generated by the mail gateway to this address; it will also be displayed as the contact person on the RT's login page.";
-      type = str;
-    };
-
-    port = mkOption {
-      description = "Which port rt-server should listen on";
-      type = port;
-      default = 4201;
-    };
-
-    sendmailPath = mkOption {
-      description = "Sendmail binary used to send... mail";
-      default = "${pkgs.msmtp}/bin/sendmail";
-      defaultText = "\${pkgs.msmtp}/bin/sendmail";
-      type = str;
-    };
-
-    sendmailArguments = mkOption {
-      description = "Arguments to call sendmailPath with";
-      default = [ ];
-      type = listOf (oneOf [ str path ]);
-    };
-
-    timeZone = mkOption {
-      description = "Used to convert times entered by users into GMT, as they are stored in the database, and back again; users can override this";
-      type = str;
-      default = config.time.timeZone;
-      defaultText = "[time.timeZone]";
-    };
-
-    rtName = mkOption {
-      description = "Name of this RT instance";
-      type = str;
-    };
-
-    organization = mkOption {
-      description = "Name of the organization of this instance";
-      type = str;
-    };
-
-    extraConfig = mkOption {
-      description = "Verbatim config to append to generated on";
-      type = lines;
-      default = "";
-    };
-  };
-
-  config = let
-    components = [
-      "rt-clean-sessions"
-      "rt-email-dashboards"
-      "rt-email-digest-daily"
-      "rt-email-digest-weekly"
-      "rt-externalize-attachments"
-      "rt-fulltext-indexer"
-      "rt-validator"
-    ];
-
-    mkTimer = name: {
-      "${name}" = {
-        wantedBy = [ "timers.target" ];
-        timerConfig.Unit = [ "${name}.service" ];
-      };
-    };
-
-    mkService = name: extraArgs: {
-      "${name}" = {
-        stopIfChanged = false;
-
-        serviceConfig = {
-          ExecStart = if extraArgs == ""
-            then "${cfg.package}/bin/${name}"
-            else mkForce "${cfg.package}/bin/${name} ${extraArgs}";
-          User = "rt";
-          Group = "rt";
-
-          PrivateNetwork = false;
-          MemoryDenyWriteExecute = false;
-        };
-
-        environment = {
-          RT_SITE_CONFIG = configFile;
-        };
-
-        path = with pkgs; [
-          w3m
-        ];
-      };
-    };
-  in (mkIf cfg.enable {
-    systemd.services = mkMerge ((map (c: mkService c "") components) ++ [
-      (mkService "rt-server" "--port ${toString cfg.port} --server Starman")
-      (mkService "rt-clean-sessions" "--skip-user")
-      (mkService "rt-fulltext-indexer" "--limit 500000")
-      (mkService "rt-validator" "--check")
-      {
-        rt-server = {
-          serviceConfig = {
-            StateDirectory = [ "rt/" "rt/attachments/" "rt/shredder/" "rt/smime/" ];
-            RuntimeDirectory = [ "rt/" "rt/mason_data/" ];
-            LogsDirectory = "rt/";
-          };
-
-          after = [ "postgresql.service" ];
-          wantedBy = [ "multi-user.target" ];
-        };
-      }
-      {
-        rt-externalize-attachments = {
-          serviceConfig.StateDirectory = "rt/attachments/";
-        };
-      }
-
-      { rt-email-digest-daily.serviceConfig.ExecStart = mkForce "${cfg.package}/bin/rt-email-digest -m daily"; }
-      { rt-email-digest-weekly.serviceConfig.ExecStart = mkForce "${cfg.package}/bin/rt-email-digest -m weekly"; }
-    ]);
-
-    systemd.timers = mkMerge ((map mkTimer components) ++ [
-      {
-        rt-clean-sessions.timerConfig.OnCalendar = "daily";
-        rt-email-dashboards.timerConfig.OnCalendar = "hourly";
-        rt-email-digest-daily.timerConfig.OnCalendar = "daily";
-        rt-email-digest-weekly.timerConfig.OnCalendar = "weekly";
-        rt-externalize-attachments.timerConfig.OnCalendar = "01:00";
-        rt-fulltext-indexer.timerConfig.OnCalendar = "02:00";
-        rt-validator.timerConfig.OnCalendar = "*-*-01 03:00:00";
-      }
-    ]);
-
-    users.users.rt = {
-      isSystemUser = true;
-      group = "rt";
-    };
-    users.groups.rt = {};
-
-    systemd.tmpfiles.rules = [
-      "d /var/lib/secrets/rt 0500 rt rt -"
-      "d /var/lib/rt/gpg 0700 rt rt -"
-    ];
-  });
-}
--- a/nixbld-etc-nixos/secret_permissions.txt
+++ b/nixbld-etc-nixos/secret_permissions.txt
@ -1,11 +1,11 @@
 -rw------- 1 root         root           backup-passphrase
 -rw------- 1 root         root           email_accounts.nix
-rw------- 1 root         root           gitea_tokens.nix
-rw------- 1 root         root           github_tokens.nix
+-rw------- 1 homu         homu           homu.toml
 -rw-rw---- 1 gitea        gitea          mailerpassword
 -rw------- 1 matterbridge matterbridge   matterbridge.toml
 -rw------- 1 uwsgi        uwsgi          mattermost-github-integration.py
 -rw------- 1 nginx        nginx          muninpasswd
 -rw-rw---- 1 hydra        hydra          nixbld.m-labs.hk-1
+-rw-rw---- 1 hydra        hydra          nix_id_rsa
+-rw------- 1 root         root           rclone.conf
 -rw------- 1 root         root           wifi_password.nix
-rw------- 1 sb           users          wifi_ext_password.nix
--- a/nixops/athena-hardware-configuration.nix
+++ b/nixops/athena-hardware-configuration.nix
@ -1,45 +0,0 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, modulesPath, ... }:
-
-{
-  imports =
-    [ (modulesPath + "/installer/scan/not-detected.nix")
-    ];
-
-  boot.kernelPackages = pkgs.linuxPackages_latest;
-  boot.initrd.availableKernelModules = [ "xhci_pci" "thunderbolt" "ahci" "nvme" "usbhid" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/89463254-b38d-45db-92b6-0f7d92a44f47";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/F84B-ACC5";
-      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
-    };
-
-  swapDevices = [ ];
-
-  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
-  # (the default) this is the recommended approach. When using systemd-networkd it's
-  # still possible to use this option, but it's recommended to use it in conjunction
-  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
-  networking.useDHCP = lib.mkDefault true;
-  # networking.interfaces.enp86s0.useDHCP = lib.mkDefault true;
-
-  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
-
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-
-  hardware.cpu.intel.updateMicrocode = true;
-
-  system.stateVersion = "23.11";
-}
--- a/nixops/avscan-module.nix
+++ b/nixops/avscan-module.nix
@ -1,45 +0,0 @@
-{ config, pkgs, lib, ... }:
-with lib;
-let
-  avscan = pkgs.writeScript "avscan" ''
-    #!${pkgs.bash}/bin/bash
-
-    for user in $(cut -d":" -f1 /etc/passwd); do
-      if [ -d "/home/$user" ]; then
-          nice -15 ${pkgs.sudo}/bin/sudo -u $user ${pkgs.clamav}/bin/clamscan --recursive --quiet --infected /home/$user
-      fi
-    done
-  '';
-  cfg = config.services.avscan;
-in
-{
-  options.services.avscan = {
-    enable = mkOption {
-      type = types.bool;
-      default = false;
-      description = "Enable antivirus scan";
-    };
-  };
-
-  config = mkIf cfg.enable {
-    services.clamav.updater.enable = true;
-    services.clamav.updater.interval = "daily";
-    services.clamav.updater.frequency = 1;
-
-    systemd.services.avscan = {
-      description = "Antivirus scan";
-      serviceConfig = {
-        Type = "oneshot";
-        User = "root";
-        Group = "root";
-        ExecStart = "${avscan}";
-      };
-    };
-
-    systemd.timers.avscan = {
-      description = "Antivirus scan";
-      wantedBy = [ "timers.target" ];
-      timerConfig.OnCalendar = "Mon *-*-* 13:00:00";
-    };
-  };
-}
--- a/nixops/chiron-hardware-configuration.nix
+++ b/nixops/chiron-hardware-configuration.nix
@ -1,3 +1,6 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
 { config, lib, pkgs, ... }:

 {
@ -18,18 +21,13 @@
  fileSystems."/boot" =
    { device = "/dev/disk/by-uuid/060C-8772";
      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
    };

  swapDevices = [ ];

-  nix.settings.max-jobs = lib.mkDefault 16;
+  nix.maxJobs = lib.mkDefault 16;
  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";

  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
-
-  hardware.cpu.intel.updateMicrocode = true;
-
-  system.stateVersion = "19.03";
 }
--- a/nixops/cnc-hardware-configuration.nix
+++ b/nixops/cnc-hardware-configuration.nix
@ -0,0 +1,29 @@
+{ config, lib, pkgs, ... }:
+
+{
+  imports =
+    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
+    ];
+
+  boot.initrd.availableKernelModules = [ "ata_generic" "uhci_hcd" "ehci_pci" "ahci" "usb_storage" "usbhid" "floppy" "sd_mod" "sr_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/35d9c50c-e479-43a9-8324-b8ded5b71844";
+      fsType = "ext4";
+    };
+
+  swapDevices =
+    [ { device = "/dev/disk/by-uuid/d8480389-c558-4c46-a58f-00207315dbdd"; }
+    ];
+
+  nix.maxJobs = lib.mkDefault 2;
+
+  boot.loader.grub.enable = true;
+  boot.loader.grub.version = 2;
+  boot.loader.grub.device = "/dev/sda";
+
+  services.xserver.videoDrivers = ["intel"];
+}
--- a/nixops/common-users.nix
+++ b/nixops/common-users.nix
@ -1,17 +1,11 @@
 { pkgs, ... }:

 {
-  root = {
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBF/YybP+fQ0J+bNqM5Vgx5vDmVqVWsgUdF1moUxghv7d73GZAFaM6IFBdrXTAa33AwnWwDPMrTgP1V6SXBkb3ciJo/lD1urJGbydbSI5Ksq9d59wvOeANvyWYrQw6+eqTQ=="
-      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCMALVC8RDTHec+PC8y1s3tcpUAODgq6DEzQdHDf/cyvDMfmCaPiMxfIdmkns5lMa03hymIfSmLUF0jFFDc7biRp7uf9AAXNsrTmplHii0l0McuOOZGlSdZM4eL817P7UwJqFMxJyFXDjkubhQiX6kp25Kfuj/zLnupRCaiDvE7ho/xay6Jrv0XLz935TPDwkc7W1asLIvsZLheB+sRz9SMOb9gtrvk5WXZl5JTOFOLu+JaRwQLHL/xdcHJTOod7tqHYfpoC5JHrEwKzbhTOwxZBQBfTQjQktKENQtBxXHTe71rUEWfEZQGg60/BC4BrRmh4qJjlJu3v4VIhC7SSHn1"
-    ];
-  };
  sb = {
    isNormalUser = true;
-    extraGroups = ["wheel" "plugdev" "dialout" "libvirtd"];
+    extraGroups = ["wheel" "plugdev" "dialout"];
    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBF/YybP+fQ0J+bNqM5Vgx5vDmVqVWsgUdF1moUxghv7d73GZAFaM6IFBdrXTAa33AwnWwDPMrTgP1V6SXBkb3ciJo/lD1urJGbydbSI5Ksq9d59wvOeANvyWYrQw6+eqTQ=="
+      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCyPk5WyFoWSvF4ozehxcVBoZ+UHgrI7VW/OoQfFFwIQe0qvetUZBMZwR2FwkLPAMZV8zz1v4EfncudEkVghy4P+/YVLlDjqDq9zwZnh8Nd/ifu84wmcNWHT2UcqnhjniCdshL8a44memzABnxfLLv+sXhP2x32cJAamo5y6fukr2qLp2jbXzR+3sv3klE0ruUXis/BR1lLqNJEYP8jB6fLn2sLKinnZPfn6DwVOk10mGeQsdME/eGl3phpjhODH9JW5V2V5nJBbC0rBnq+78dyArKVqjPSmIcSy72DEIpTctnMEN1W34BGrnsDd5Xd/DKxKxHKTMCHtZRwLC2X0NWN"
      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCMALVC8RDTHec+PC8y1s3tcpUAODgq6DEzQdHDf/cyvDMfmCaPiMxfIdmkns5lMa03hymIfSmLUF0jFFDc7biRp7uf9AAXNsrTmplHii0l0McuOOZGlSdZM4eL817P7UwJqFMxJyFXDjkubhQiX6kp25Kfuj/zLnupRCaiDvE7ho/xay6Jrv0XLz935TPDwkc7W1asLIvsZLheB+sRz9SMOb9gtrvk5WXZl5JTOFOLu+JaRwQLHL/xdcHJTOod7tqHYfpoC5JHrEwKzbhTOwxZBQBfTQjQktKENQtBxXHTe71rUEWfEZQGg60/BC4BrRmh4qJjlJu3v4VIhC7SSHn1"
    ];
  };
@ -25,12 +19,26 @@
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMUaB2G1jexxfkdlly3fdWslH54/s/bOuvk9AxqpjtAY robert-jordens-ed25519"
    ];
  };
-
-  guest = {
+  harry = {
+    isNormalUser = true;
+    extraGroups = ["plugdev" "dialout" "wireshark"];
+    openssh.authorizedKeys.keys = [
+      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBDcPNCgtdz8erFPRrAwCr4JrkeYXJUUvoRBgP0X2HlzJgDe1Inuo6sC6CGcO3IXbf4MwVA9XEp8BYPHARVeEHhufg/0wnIABLx2GcK99yxOLDUe4h/3YwtqvOcqHEsDx7w=="
+    ];
+  };
+  astro = {
    isNormalUser = true;
    extraGroups = ["plugdev" "dialout"];
    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBPsv4UMEFV0UHeHdA9R3sC+qoMxrqhcuFqwqWMI4AF/lixwcbRyA8QKiu/7R22m2u6pp+Zk6hYqcxdgClI4uN2oQhVjJX6wEgfT94vC/67OKJI/NNVsR8G0lr0ufCo4Lbw=="
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGJJTSJdpDh82486uPiMhhyhnci4tScp5uUe7156MBC8 a"
+    ];
+    shell = pkgs.bashInteractive;
+  };
+  pca006132 = {
+    isNormalUser = true;
+    extraGroups = ["plugdev" "dialout"];
+    openssh.authorizedKeys.keys = [
+      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBE/sPOOiw3843+rrcYV2pOVkffNc1xsOgnuCUmy1Fa2VF8x9kqmgQv61sxsuKRkKKoinvqrASxLkWVd6nkiiDuEISibEXs8r1BwuT05cS7RkEhCakSMZ6y/iqOtjt2bx+A=="
    ];
  };
  occheung = {
@ -40,83 +48,11 @@
      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBPEvmWmxpFpMgp5fpjKud8ev0cyf/+X5fEpQt/YD/+u4mbvZYPE300DLqQ0h/qjgvaGMz1ndf4idYnRdy+plJEC/+hmlRW5NlcpAr3S/LYAisacgKToFVl+MlBo+emS9Ig=="
    ];
  };
-  spaqin = {
+  dsleung = {
    isNormalUser = true;
    extraGroups = ["plugdev" "dialout"];
    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBOtmlQmIK/cEUkcwA/y9jC4AohjoEmikerpxzPhZZtOcENidN/vFum58jIcSxBvjHnILOzhfCTeLvbvGbQOFE53a7FOyEHmIzXRKS86Mg5bPHUBJxRSq9MjulGZXES3HOQ=="
-    ];
-    shell = pkgs.zsh;
-  };
-  srayman89 = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout" "libvirtd"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBMoGOV9HoFkm6S6zMfOc8ivUcGzKFxuqpmOXKQtg2nn5Kh6ByMuuAHFlvKISILBaWgXN8lPQN9VjLuXV93oG4Pe7u8EVw20IGbA6RZ4Pnnr1xQBESPbye+72taLvyQlxGA=="
-    ];
-  };
-  esavkin = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout" "libvirtd" "wireshark"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBLDJI4GFLBmScbeR8Jh4Gi8A/2nuGlYtFTJVT+Es/bzdiPRk8DLG62T0hyRR+8LfHjbrCsDuYFNztT8hHGXd7h3xp3y2X7ArkJo8xUK5QxGd5D2Zn4ANfZTTVkoGlEHbFA=="
-    ];
-  };
-  flo = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBF4ZYNBYqJPQCKBYjMatFj5eGMyzh/X2TSraJEG6XBdg3jnJ3WcsOd7sm+vx+o9Y1EJ2kvwW/Vy9c3OYVU2U45njox//sKtt8Eyzszws3EYJqHQ6KAwXtW9ao4aamRtK3Q=="
-    ];
-  };
-  srenblad = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBLoMzO8XIkUTKUC0R05EmXn3V6gm2oMvXhh+j68G9TDBeb8x0WFkz16NPclsXdMcb2dFhtLmxUHwB5L4zWSuyYkqr0YRrtly3uwXe5Wnyz1ZAkxoq7YjQlanWSri11U8xw=="
-    ];
-  };
-  linuswck = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout" "wireshark" "libvirtd"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBAFYwmik6/xY1vb9aKBOpKklKOwSJJ0PEgNwWNULghZGJ0g4CTk04LXLSMYBm1SW74df8YMgaE/eoidq6smN6hKIgo8s3qPQGZAi4UXffMs2ciqXNa/zZcCu3PyZvyksxA=="
-    ];
-  };
-  morgan = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout" "wireshark" "libvirtd"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBDXMbJEPn0mM2Bgt6eMAd+c0J5oPSvquZG+BxKdUf0qbeQldRaoB26NHMZnLte/fS00U/cqStLWDiwtEvH5WlbbawsMBymm65zbWMByebXhBDjdr6a1kkOFcKJvAL9qVBQ=="
-    ];
-  };
-  atse = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBJHMX1YDnBPQfZyGVtc93u4TIFWqnHEe6WB/eTeiOjFulitXzGfhsODZ08GzTi2+YKk7spRiPKNwRPTKFuW2PPe3Xig8b75qRMIeIVX3b7e0i6xP85eg4jdiz0LD2YGUHQ=="
-    ];
-  };
-  derppening = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBOKwN4ui94QfouYYlkI1lc3WgtjURVYLTdAizJIBnY3dNRNblAiuvTD4pQ+LEI+eOTg4SnQz1NeqH4YOQhbT5+/nZojvGTb3UVN13ZYND+Gci3DdqB2mwIYop7kMXwHgLQ=="
-    ];
-  };
-  therobs12 = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBK1tUg7TtceARRnGI80Ai5kNFolFfZ++LH9v1UoRCiJdxeQWPdNYO0Gj7+ejJvgZXwvN4yHGgcZHraEml4Mj/dKrEMFygfuYLDRmXtPFwX6TNMrWlxMhPzuNY+yCaxlqYg=="
-    ];
-  };
-
-  dpn = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBGChLocYJi8XcSJkIjT2Olm3jPGjtRq5aORa5G9F3OqmjCfvav9Q5+2Mc64XqHtNTffnJuDe4gv+lVJatC0URvPs2HyxXmxRK0jgkkLSUsV2SYLlgMqHW3jsrdh6wKBmkg=="
+      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBDbE7HzZKSwGbgRnzwrzCzb3gZKLSritwnEpHS4sa9oXJ5oLFkuFZOpPYDeiMlbUJ9jCk5FRmkLYIkrbz06SUr7P/eUjxu79ENi3RhfVu+ZrrPvgkhKvM/CiXvw3xCOu0w=="
    ];
  };
 }
--- a/nixops/demeter-hardware-configuration.nix
+++ b/nixops/demeter-hardware-configuration.nix
@ -1,46 +0,0 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, modulesPath, ... }:
-
-{
-  imports =
-    [ (modulesPath + "/installer/scan/not-detected.nix")
-    ];
-
-  boot.initrd.availableKernelModules = [ "xhci_pci" "thunderbolt" "ahci" "nvme" "usbhid" "usb_storage" "sd_mod" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/c7fa9c3e-56ca-4258-a49c-3f064efbd58c";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/76A2-F01F";
-      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
-    };
-
-  swapDevices = [ ];
-
-  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
-  # (the default) this is the recommended approach. When using systemd-networkd it's
-  # still possible to use this option, but it's recommended to use it in conjunction
-  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
-  networking.useDHCP = lib.mkDefault true;
-  # networking.interfaces.enp86s0.useDHCP = lib.mkDefault true;
-  # networking.interfaces.wlo1.useDHCP = lib.mkDefault true;
-
-  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
-  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
-
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-
-  hardware.cpu.intel.updateMicrocode = true;
-
-  system.stateVersion = "23.05";
-}
--- a/nixops/desktop.nix
+++ b/nixops/desktop.nix
@ -2,47 +2,20 @@

 { config, pkgs, ... }:
 let
-  artiq = builtins.getFlake git+https://github.com/m-labs/artiq.git;
+  m-labs = import (fetchTarball https://nixbld.m-labs.hk/channel/custom/artiq/full/artiq-full/nixexprs.tar.xz) { inherit pkgs; };
+  pkgs-unstable = import (fetchTarball https://github.com/NixOS/nixpkgs/archive/master.tar.gz) {};
 in
 {
  deployment.targetHost = host;
-  deployment.hasFastConnection = true;
-  nix.nixPath = [ "nixpkgs=${pkgs.path}" ];
-  programs.command-not-found.dbPath = "${pkgs.path}/programs.sqlite";
-
-  boot.loader.systemd-boot.memtest86.enable = true;
-  boot.loader.grub.memtest86.enable = true;

+  disabledModules = [ "security/pam.nix" ];
  imports =
    [
      (./. + "/${host}-hardware-configuration.nix")
-      ./avscan-module.nix
+      ./pam_p11
    ];
-  nixpkgs.config.packageOverrides = super: let self = super.pkgs; in {
-    libp11 = super.libp11.override({ openssl = super.openssl_1_1; });
-    pam_p11 = super.pam_p11.overrideAttrs(oa: {
-      patches = [];
-      postPatch = ''
-        substituteInPlace src/match_openssh.c --replace \
-          '"%s/.ssh/authorized_keys", pw->pw_dir)' \
-          '"/etc/ssh/authorized_keys.d/%s", pw->pw_name)'
-        '';
-    });
-    gnome = super.gnome // {
-       gnome-keyring = super.gnome.gnome-keyring.overrideAttrs(oa: {
-          configureFlags = oa.configureFlags ++ ["--disable-ssh-agent"];
-        });
-    };
-  };
-  nixpkgs.config.permittedInsecurePackages = [
-    "openssl-1.1.1w"
-  ];
-
-  boot.binfmt.emulatedSystems = [ "armv7l-linux" ];

  networking.hostName = host;
-  networking.firewall.allowedTCPPorts = [ 1883 ];
-  networking.firewall.allowedUDPPorts = [ 1883 ];

  time.timeZone = "Asia/Hong_Kong";

@ -50,63 +23,38 @@ in
  # $ nix search wget
  nixpkgs.config.allowUnfree = true;
  environment.systemPackages = with pkgs; [
-    opensc yubikey-manager yubikey-manager-qt yubico-piv-tool
-    wget vim gitAndTools.gitFull sshfs
-    firefox
-    thunderbird
-    chromium
-    usbutils pciutils uhubctl file lm_sensors audacious acpi
+    opensc yubikey-manager yubikey-manager-qt
+    wget vim gitAndTools.gitFull firefox chromium thunderbird hexchat
+    usbutils pciutils file lm_sensors audacious acpi
    gimp imagemagick
-    (python3.withPackages(ps: with ps; [ numpy scipy matplotlib qtconsole regex jinja2 ]))
-    texlive.combined.scheme-full
+    (python3.withPackages(ps: with ps; [ numpy scipy matplotlib qtconsole regex ]))
    mosh psmisc libreoffice-fresh
-    inkscape
-    xournal
-    xsane
-    gtkwave unzip zip gnupg
-    gnome-tweaks
-    ghex
+    gtkwave telnet unzip zip gnupg
+    gnome3.gnome-tweaks
    jq sublime3 rink qemu_kvm
-    tmux screen gdb minicom picocom
-    artiq.packages.x86_64-linux.openocd-bscanspi
-    xc3sprog
-    gqrx
+    tmux xc3sprog m-labs.openocd screen gdb minicom picocom tigervnc
    emacs bat ripgrep
-    guake
-    vscodium
-    waypipe
-    virt-manager spice-gtk
-    kicad
-    any-nix-shell
+    pkgs-unstable.rust-analyzer
+    (pkgs-unstable.vscode-with-extensions.override {
+      vscodeExtensions = [
+        pkgs-unstable.vscode-extensions.matklad.rust-analyzer
+      ];
+    })
+    (import ./fish-nix-shell)
  ];
  programs.wireshark.enable = true;
-  programs.wireshark.package = pkgs.wireshark;
-  virtualisation.libvirtd.enable = true;
-  virtualisation.libvirtd.qemu.ovmf.enable = true;
-  security.wrappers.spice-client-glib-usb-acl-helper = {
-    source = "${pkgs.spice-gtk}/bin/spice-client-glib-usb-acl-helper";
-    owner = "root";
-    group = "root";
-    setuid = true;
-  };
-
-  services.avscan.enable = true;

  services.openssh.enable = true;
-  services.openssh.authorizedKeysInHomedir = false;
-  services.openssh.settings.PasswordAuthentication = false;
-  services.openssh.extraConfig =
-    ''
-    StreamLocalBindUnlink yes
-    '';
-  programs.mosh.enable = true;
-
+  services.openssh.forwardX11 = true;
+  services.openssh.passwordAuthentication = false;
+  hardware.u2f.enable = true;
  services.pcscd.enable = true;
  programs.ssh.extraConfig =
    ''
    PKCS11Provider "${pkgs.opensc}/lib/opensc-pkcs11.so"
    '';
  programs.ssh.startAgent = true;
+  services.gnome3.gnome-keyring.enable = pkgs.lib.mkForce false;
  programs.ssh.agentPKCS11Whitelist = "${pkgs.opensc}/lib/opensc-pkcs11.so";
  security.pam.p11.enable = true;

@ -126,54 +74,76 @@ in
  };
  services.avahi = {
    enable = true;
-    nssmdns4 = true;
+    nssmdns = true;
  };

-  hardware.graphics.enable32Bit = true;
+  # Enable sound.
+  sound.enable = true;
+  hardware.pulseaudio = {
+    enable = true;
+    extraModules = [ pkgs.pulseaudio-modules-bt ];
+    package = pkgs.pulseaudioFull;
+  };

-  fonts.packages = [ pkgs.noto-fonts pkgs.noto-fonts-cjk-sans pkgs.noto-fonts-emoji pkgs.noto-fonts-extra pkgs.emacs-all-the-icons-fonts ];
+  i18n.inputMethod = {
+    enabled = "fcitx";
+    fcitx.engines = with pkgs.fcitx-engines; [ table-extra m17n ];
+  };
+  fonts.fonts = [ pkgs.noto-fonts pkgs.noto-fonts-cjk pkgs.noto-fonts-emoji pkgs.noto-fonts-extra pkgs.emacs-all-the-icons-fonts ];

  # Enable the X11 windowing system.
  services.xserver.enable = true;
-  services.xserver.xkb.layout = "us";
-  services.xserver.xkb.options = "eurosign:e";
+  services.xserver.layout = "us";
+  services.xserver.xkbOptions = "eurosign:e";
+
+  # Enable touchpad support.
+  services.xserver.libinput.enable = true;

  services.xserver.displayManager.gdm.enable = true;
-  services.xserver.desktopManager.gnome.enable = true;
-  environment.gnome.excludePackages = [ pkgs.epiphany ];
-
-  systemd.suppressedSystemUnits = [
-      "hibernate.target"
-      "suspend.target"
-      "suspend-then-hibernate.target"
-      "sleep.target"
-      "hybrid-sleep.target"
-      "systemd-hibernate.service"
-      "systemd-hybrid-sleep.service"
-      "systemd-suspend.service"
-      "systemd-suspend-then-hibernate.service"
-  ];
+  services.xserver.displayManager.gdm.autoSuspend = false;
+  powerManagement.enable = false;
+  services.xserver.desktopManager.gnome3.enable = true;
+  environment.gnome3.excludePackages = [ pkgs.epiphany pkgs.gnome3.geary ];

  hardware.bluetooth.enable = true;

-  programs.zsh.enable = true;
  programs.fish.enable = true;
  programs.fish.promptInit = ''
-    any-nix-shell fish --info-right | source
+    fish-nix-shell --info-right | source
  '';
  users.mutableUsers = false;
  users.defaultUserShell = pkgs.fish;
  users.extraGroups.plugdev = { };
  users.extraUsers = import ./common-users.nix { inherit pkgs; };
  security.sudo.wheelNeedsPassword = false;
-  services.udev.packages = [ artiq.packages.x86_64-linux.openocd-bscanspi ];
-  services.udev.extraRules = (import ./extra-udev.nix);
-
-  nix.settings.trusted-public-keys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
-  nix.settings.substituters = ["https://nixbld.m-labs.hk?priority=10"];
-  nix.settings.extra-sandbox-paths = ["/opt"];
-
-  nix.extraOptions = ''
-    experimental-features = nix-command flakes impure-derivations
+  services.udev.packages = [ m-labs.openocd ];
+  services.udev.extraRules = ''
+# leaf maple
+SUBSYSTEM=="usb", ATTRS{idVendor}=="1eaf", ATTRS{idProduct}=="0003", MODE="0660", GROUP="plugdev"
+SUBSYSTEM=="usb", ATTRS{idVendor}=="1eaf", ATTRS{idProduct}=="0004", MODE="0660", GROUP="plugdev"
+# glasgow
+SUBSYSTEM=="usb", ATTRS{idVendor}=="20b7", ATTRS{idProduct}=="9db1", MODE="0660", GROUP="plugdev"
+# hackrf
+SUBSYSTEM=="usb", ATTRS{idVendor}=="1d50", ATTRS{idProduct}=="6089", MODE="0660", GROUP="plugdev"
+# bladerf
+SUBSYSTEM=="usb", ATTRS{idVendor}=="2cf0", ATTRS{idProduct}=="5250", MODE="0660", GROUP="plugdev"
+# personal measurement device
+SUBSYSTEM=="usb", ATTRS{idVendor}=="09db", ATTRS{idProduct}=="007a", MODE="0660", GROUP="plugdev"
+# saleae
+SUBSYSTEM=="usb", ATTRS{idVendor}=="0925", ATTRS{idProduct}=="3881", MODE="0660", GROUP="plugdev"
+# ocean optics
+SUBSYSTEM=="usb", ATTRS{idVendor}=="2457", ATTRS{idProduct}=="1002", MODE="0660", GROUP="plugdev"
+# yubikey
+SUBSYSTEM=="usb", ATTRS{idVendor}=="1050", ATTRS{idProduct}=="0116", MODE="0660", GROUP="plugdev"
  '';
+
+  nix.binaryCachePublicKeys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
+  nix.binaryCaches = ["https://nixbld.m-labs.hk" "https://cache.nixos.org"];
+  nix.sandboxPaths = ["/opt"];
+
+  # This value determines the NixOS release with which your system is to be
+  # compatible, in order to avoid breaking some software such as database
+  # servers. You should change this only after NixOS release notes say you
+  # should.
+  system.stateVersion = "19.03"; # Did you read the comment?
 }
--- a/nixops/extra-udev.nix
+++ b/nixops/extra-udev.nix
@ -1,27 +0,0 @@
-''
-# hackrf
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1d50", ATTRS{idProduct}=="6089", MODE="0660", GROUP="plugdev"
-# bladerf
-SUBSYSTEM=="usb", ATTRS{idVendor}=="2cf0", ATTRS{idProduct}=="5250", MODE="0660", GROUP="plugdev"
-# personal measurement device
-SUBSYSTEM=="usb", ATTRS{idVendor}=="09db", ATTRS{idProduct}=="007a", MODE="0660", GROUP="plugdev"
-# saleae
-SUBSYSTEM=="usb", ATTRS{idVendor}=="0925", ATTRS{idProduct}=="3881", MODE="0660", GROUP="plugdev"
-# ocean optics
-SUBSYSTEM=="usb", ATTRS{idVendor}=="2457", ATTRS{idProduct}=="1002", MODE="0660", GROUP="plugdev"
-# yubikey
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1050", ATTRS{idProduct}=="0116", MODE="0660", GROUP="plugdev"
-# label printer
-SUBSYSTEM=="usb", ATTRS{idVendor}=="07cf", ATTRS{idProduct}=="4204", MODE="0660", GROUP="plugdev"
-# dfu/booster
-SUBSYSTEM=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="df11", MODE="0660", GROUP="plugdev"
-# Renkforce USB hub with power control
-SUBSYSTEM=="usb", ATTRS{idVendor}=="2109", ATTRS{idProduct}=="0812", MODE="0660", GROUP="plugdev"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="2109", ATTRS{idProduct}=="2812", MODE="0660", GROUP="plugdev"
-# LibreVNA
-SUBSYSTEM=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="4121", MODE="0660", GROUP="plugdev"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1209", ATTRS{idProduct}=="4121", MODE="0660", GROUP="plugdev"
-# DSLogic
-SUBSYSTEM=="usb", ATTRS{idVendor}=="2a0e", ATTRS{idProduct}=="0020", MODE="0660", GROUP="plugdev"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="2a0e", ATTRS{idProduct}=="0034", MODE="0660", GROUP="plugdev"
-''
--- a/nixops/fish-nix-shell/LICENSE
+++ b/nixops/fish-nix-shell/LICENSE
@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 haslersn
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/nixops/fish-nix-shell/README.md
+++ b/nixops/fish-nix-shell/README.md
@ -0,0 +1,50 @@
+# fish-nix-shell
+fish support for the *nix-shell* environment of the Nix package manager.
+
+## Installation
+
+### Installation in the user environment
+
+Execute
+
+```
+nix-env -if https://github.com/haslersn/fish-nix-shell/archive/master.tar.gz
+```
+
+and add the following to your *~/.config/fish/config.fish*. Create it if it doesn't exist.
+
+```
+fish-nix-shell --info-right | source
+```
+
+### System-wide installation
+
+Add the package to your */etc/nixos/configuration.nix*:
+
+```
+  environment.systemPackages = with pkgs; [
+    #
+    # Other packages here ...
+    #
+    (import (fetchGit "https://github.com/haslersn/fish-nix-shell"))
+  ];
+```
+
+and then execute: `sudo nixos-rebuild switch`
+
+If you want to configure it system-wide, also add:
+
+```
+  programs.fish.enable = true;
+  programs.fish.promptInit = ''
+    fish-nix-shell --info-right | source
+  '';
+```
+
+## Flags
+
+The `fish-nix-shell` command **optionally** takes the following flags:
+
+| Flag | Meaning |
+| - | - |
+| `--info-right` | While in a *fish-nix-shell*, display information about the loaded packages at the right.
--- a/nixops/fish-nix-shell/bin/fish-nix-shell
+++ b/nixops/fish-nix-shell/bin/fish-nix-shell
@ -0,0 +1,34 @@
+#!/bin/sh
+
+function init_fish () {
+                cat <<EOF
+
+# Overwrite the nix-shell command
+function nix-shell
+    fish-nix-shell-wrapper \$argv
+    set -gx FISH_NIX_SHELL_EXIT_STATUS \$status
+end
+EOF
+    for arg in "$@"; do
+        case "$arg" in
+            --info-right)
+                cat <<EOF
+
+# Print additional information inside a nix-shell environment
+function fish_right_prompt
+    nix-shell-info
+    set -e FISH_NIX_SHELL_EXIT_STATUS
+end
+EOF
+                ;;
+            *) exit 1;;
+        esac
+    done
+}
+
+cat <<EOF
+# If you see this output, you probably forgot to pipe this output into 'source':
+# fish-nix-shell $@ | source
+EOF
+
+init_fish "$@"
--- a/nixops/fish-nix-shell/bin/fish-nix-shell-wrapper
+++ b/nixops/fish-nix-shell/bin/fish-nix-shell-wrapper
@ -0,0 +1,22 @@
+#!/bin/sh
+fns () {
+    pkgs=$FISH_NIX_SHELL_PKGS
+    for arg in "$@"; do
+        if [[ $arg == -* ]]; then
+            pkg=
+            if [[ $arg == --pure ]] || [[ $arg == --command ]] || [[ $arg == --run ]]; then
+                command nix-shell $@
+                return
+            elif [[ $arg == -p ]] || [[ $arg == --packages ]]; then
+                pkg=1
+            fi
+        elif [[ $pkg == 1 ]]; then
+            pkgs+=" "$arg
+        fi
+    done
+    if [[ -n $name ]] && [[ $name != shell ]]; then
+        pkgs+=" "$name
+    fi
+    env FISH_NIX_SHELL_PKGS="$pkgs" nix-shell "$@" --command fish
+}
+fns "$@"
--- a/nixops/fish-nix-shell/bin/nix-shell-info
+++ b/nixops/fish-nix-shell/bin/nix-shell-info
@ -0,0 +1,21 @@
+#!/bin/sh
+if [[ $IN_NIX_SHELL != "" ]]; then
+    printf "\033[1;32m"
+    output=$(echo $FISH_NIX_SHELL_PKGS | xargs)
+    if [[ -n $name ]] && [[ $name != shell ]]; then
+        output+=" "$name
+    fi
+    if [[ -n $output ]]; then
+        output=$(echo $output $additional_pkgs | tr ' ' '\n' | sort -u | tr '\n' ' ' | xargs)
+        printf "$output "
+    else
+        printf "[unknown nix-shell] "
+    fi
+    printf "\033[0m"
+elif [[ $FISH_NIX_SHELL_EXIT_STATUS ]]; then
+    if [[ $FISH_NIX_SHELL_EXIT_STATUS == 0 ]]; then
+      printf "\033[1;36mexited nix-shell \033[0m"
+    else
+      printf "\033[1;31mERROR \033[0m"
+    fi
+fi
--- a/nixops/fish-nix-shell/default.nix
+++ b/nixops/fish-nix-shell/default.nix
@ -0,0 +1,16 @@
+with import <nixpkgs> {}; stdenv.mkDerivation rec {
+  name = "fish-nix-shell";
+  src = fetchGit "https://github.com/haslersn/fish-nix-shell";
+  nativeBuildInputs = [ makeWrapper ];
+  installPhase = ''
+    mkdir -p $out
+    cp LICENSE $out
+    cp -r bin $out
+    wrapProgram $out/bin/fish-nix-shell
+    wrapProgram $out/bin/fish-nix-shell-wrapper --prefix PATH ":" ${fish}/bin
+    wrapProgram $out/bin/nix-shell-info
+  '';
+  meta.description = "fish support for the nix-shell environment of the Nix package manager.";
+  meta.license = "MIT";
+  meta.homepage = https://github.com/haslersn/fish-nix-shell;
+}
--- a/nixops/franz-hardware-configuration.nix
+++ b/nixops/franz-hardware-configuration.nix
@ -1,39 +0,0 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, modulesPath, ... }:
-
-{
-  imports =
-    [ (modulesPath + "/installer/scan/not-detected.nix")
-    ];
-
-  boot.initrd.availableKernelModules = [ "xhci_pci" "thunderbolt" "ahci" "nvme" "usbhid" "usb_storage" "sd_mod" "rtsx_pci_sdmmc" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.blacklistedKernelModules = [ "iwlwifi" ];
-  boot.extraModulePackages = [ ];
-  boot.kernelParams = ["intel_idle.max_cstate=1"];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/37e69920-a60d-4cb0-ae2f-b812f7a35dc8";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/A33B-F001";
-      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
-    };
-
-  swapDevices = [ ];
-
-  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
-
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-
-  hardware.cpu.intel.updateMicrocode = true;
-
-  system.stateVersion = "21.05";
-}
--- a/nixops/hera-hardware-configuration.nix
+++ b/nixops/hera-hardware-configuration.nix
@ -1,3 +1,6 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
 { config, lib, pkgs, ... }:

 {
@ -18,18 +21,13 @@
  fileSystems."/boot" =
    { device = "/dev/disk/by-uuid/8C30-F6DC";
      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
    };

  swapDevices = [ ];

-  nix.settings.max-jobs = lib.mkDefault 16;
+  nix.maxJobs = lib.mkDefault 16;
  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";

  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
-
-  hardware.cpu.intel.updateMicrocode = true;
-
-  system.stateVersion = "19.03";
 }
--- a/nixops/hestia-hardware-configuration.nix
+++ b/nixops/hestia-hardware-configuration.nix
@ -1,3 +1,6 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
 { config, lib, pkgs, ... }:

 {
@ -18,18 +21,13 @@
  fileSystems."/boot" =
    { device = "/dev/disk/by-uuid/E085-5F21";
      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
    };

  swapDevices = [ ];

-  nix.settings.max-jobs = lib.mkDefault 16;
+  nix.maxJobs = lib.mkDefault 16;
  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";

  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
-
-  hardware.cpu.intel.updateMicrocode = true;
-
-  system.stateVersion = "19.03";
 }
--- a/nixops/juno-hardware-configuration.nix
+++ b/nixops/juno-hardware-configuration.nix
@ -1,42 +1,30 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, modulesPath, ... }:
+{ config, lib, pkgs, ... }:

 {
  imports =
-    [ (modulesPath + "/installer/scan/not-detected.nix")
+    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
    ];

-  boot.initrd.availableKernelModules = [ "ehci_pci" "ata_piix" "xhci_pci" "ahci" "usbhid" "usb_storage" "sd_mod" ];
+  boot.initrd.availableKernelModules = [ "xhci_pci" "ehci_pci" "ahci" "usbhid" "usb_storage" "sd_mod" "sr_mod" ];
  boot.initrd.kernelModules = [ ];
  boot.kernelModules = [ "kvm-intel" ];
  boot.extraModulePackages = [ ];

  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/3dca09c8-f725-416a-9f89-b69297698ca9";
+    { device = "/dev/disk/by-uuid/62a38d9c-452c-4648-be12-6131e95b8276";
      fsType = "ext4";
    };

+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/88F6-46F2";
+      fsType = "vfat";
+    };
+
  swapDevices = [ ];

-  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
-  # (the default) this is the recommended approach. When using systemd-networkd it's
-  # still possible to use this option, but it's recommended to use it in conjunction
-  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
-  networking.useDHCP = lib.mkDefault true;
-  # networking.interfaces.enp5s0.useDHCP = lib.mkDefault true;
+  nix.maxJobs = lib.mkDefault 8;
+  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";

-  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
-  hardware.cpu.intel.updateMicrocode = true;
-
-  boot.loader.grub.enable = true;
-  boot.loader.grub.device = "/dev/sda";
-
-  nixpkgs.config.nvidia.acceptLicense = true;
-  hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.legacy_470;
-  services.xserver.videoDrivers = [ "nvidia" ];
-  services.xserver.displayManager.gdm.wayland = false;
-
-  system.stateVersion = "23.05";
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
 }
--- a/nixops/jupiter-hardware-configuration.nix
+++ b/nixops/jupiter-hardware-configuration.nix
@ -1,43 +0,0 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, modulesPath, ... }:
-
-{
-  imports =
-    [ (modulesPath + "/installer/scan/not-detected.nix")
-    ];
-
-  boot.initrd.availableKernelModules = [ "xhci_pci" "thunderbolt" "ahci" "nvme" "usbhid" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/315af039-6799-43ac-8999-7da69a6fbd1e";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/45B7-790E";
-      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
-    };
-
-  swapDevices = [ ];
-
-  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
-  # (the default) this is the recommended approach. When using systemd-networkd it's
-  # still possible to use this option, but it's recommended to use it in conjunction
-  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
-  networking.useDHCP = lib.mkDefault true;
-  # networking.interfaces.enp86s0.useDHCP = lib.mkDefault true;
-
-  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
-  hardware.cpu.intel.updateMicrocode = true;
-  
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-  
-  system.stateVersion = "24.05";
-}
--- a/nixops/light.nix
+++ b/nixops/light.nix
@ -0,0 +1,112 @@
+{ host }:
+
+{ config, pkgs, ... }:
+{
+  deployment.targetHost = host;
+
+  disabledModules = [ "security/pam.nix" ];
+  imports =
+    [
+      (./. + "/${host}-hardware-configuration.nix")
+      ./pam_p11
+    ];
+
+  networking.hostName = host;
+
+  time.timeZone = "Asia/Hong_Kong";
+
+  # List packages installed in system profile. To search, run:
+  # $ nix search wget
+  documentation.enable = false;
+  nixpkgs.config.allowUnfree = true;
+  environment.systemPackages = with pkgs; [
+    opensc
+    wget vim git firefox usbutils pciutils file lm_sensors acpi
+    gimp imagemagick
+    (python3.withPackages(ps: with ps; [ numpy scipy ]))
+    psmisc
+    telnet unzip zip gnupg
+    sublime3 rink
+    tmux screen tigervnc
+    (import ./fish-nix-shell)
+  ];
+  programs.wireshark.enable = true;
+
+  services.openssh.enable = true;
+  services.openssh.forwardX11 = true;
+  services.openssh.passwordAuthentication = false;
+  hardware.u2f.enable = true;
+  services.pcscd.enable = true;
+  programs.ssh.extraConfig =
+    ''
+    PKCS11Provider "${pkgs.opensc}/lib/opensc-pkcs11.so"
+    '';
+  programs.ssh.startAgent = true;
+  programs.ssh.agentPKCS11Whitelist = "${pkgs.opensc}/lib/opensc-pkcs11.so";
+  security.pam.p11.enable = true;
+
+  # Enable CUPS to print documents.
+  services.printing = {
+    enable = true;
+    extraConf =
+      ''
+      Browsing Off
+      BrowseLocalProtocols none
+      '';
+    browsedConf =
+      ''
+      BrowseRemoteProtocols none
+      BrowseProtocols none
+      '';
+  };
+  services.avahi = {
+    enable = true;
+    nssmdns = true;
+  };
+
+  # Enable sound.
+  sound.enable = true;
+  hardware.pulseaudio = {
+    enable = true;
+    extraModules = [ pkgs.pulseaudio-modules-bt ];
+    package = pkgs.pulseaudioFull;
+  };
+
+  i18n.inputMethod = {
+    enabled = "fcitx";
+    fcitx.engines = with pkgs.fcitx-engines; [ table-extra m17n ];
+  };
+  fonts.fonts = [ pkgs.noto-fonts pkgs.noto-fonts-cjk pkgs.noto-fonts-emoji pkgs.noto-fonts-extra ];
+
+  # Enable the X11 windowing system.
+  services.xserver.enable = true;
+  services.xserver.layout = "us";
+  services.xserver.xkbOptions = "eurosign:e";
+
+  # Enable touchpad support.
+  services.xserver.libinput.enable = true;
+
+  services.xserver.displayManager.lightdm.enable = true;
+  services.xserver.desktopManager.xfce.enable = true;
+
+  programs.fish.enable = true;
+  programs.fish.promptInit = ''
+    fish-nix-shell --info-right | source
+  '';
+  users.mutableUsers = false;
+  users.defaultUserShell = pkgs.fish;
+  users.extraGroups.plugdev = { };
+  users.extraUsers = import ./common-users.nix { inherit pkgs; };
+  
+  security.sudo.wheelNeedsPassword = false;
+
+  nix.binaryCachePublicKeys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
+  nix.binaryCaches = ["https://nixbld.m-labs.hk" "https://cache.nixos.org"];
+  nix.sandboxPaths = ["/opt"];
+
+  # This value determines the NixOS release with which your system is to be
+  # compatible, in order to avoid breaking some software such as database
+  # servers. You should change this only after NixOS release notes say you
+  # should.
+  system.stateVersion = "19.03"; # Did you read the comment?
+}
--- a/nixops/nixops.nix
+++ b/nixops/nixops.nix
@ -1,23 +1,13 @@
 {
-  network.storage.legacy = {
-     databasefile = "~/.nixops/deployments.nixops";
-  };
-
-  network.enableRollback = true;
-
-  rpi-1 = import ./rpi.nix { host = "rpi-1"; rpi4 = true; };
+  rpi-1 = import ./rpi.nix { host = "rpi-1"; rpi4 = false; };
+  rpi-2 = import ./rpi.nix { host = "rpi-2"; rpi4 = false; };
+  rpi-3 = import ./rpi.nix { host = "rpi-3"; rpi4 = true; };
  rpi-4 = import ./rpi.nix { host = "rpi-4"; rpi4 = true; };
+  rpi-5 = import ./rpi.nix { host = "rpi-5"; rpi4 = true; };
+  juno = import ./desktop.nix { host = "juno"; };
  zeus = import ./desktop.nix { host = "zeus"; };
  hera = import ./desktop.nix { host = "hera"; };
  hestia = import ./desktop.nix { host = "hestia"; };
  chiron = import ./desktop.nix { host = "chiron"; };
-  old-nixbld = import ./desktop.nix { host = "old-nixbld"; };
-  franz = import ./desktop.nix { host = "franz"; };
-  juno = import ./desktop.nix { host = "juno"; };
-  demeter = import ./desktop.nix { host = "demeter"; };
-  vulcan = import ./desktop.nix { host = "vulcan"; };
-  rc = import ./desktop.nix { host = "rc"; };
-  athena = import ./desktop.nix { host = "athena"; };
-  jupiter = import ./desktop.nix { host = "jupiter"; };
-  saturn = import ./desktop.nix { host = "saturn"; };
+  cnc = import ./light.nix { host = "cnc"; };
 }
--- a/nixops/old-nixbld-hardware-configuration.nix
+++ b/nixops/old-nixbld-hardware-configuration.nix
@ -1,34 +0,0 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, ... }:
-
-{
-  imports =
-    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
-    ];
-
-  boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "ahci" "usbhid" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-amd" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/69b15848-1cfc-4e3e-91de-1df0d2fc7a80";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/D0A3-DDAE";
-      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
-    };
-
-  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
-  hardware.cpu.amd.updateMicrocode = true;
-
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-
-  system.stateVersion = "22.05";
-}
--- a/nixops/pam_p11/default.nix
+++ b/nixops/pam_p11/default.nix
@ -0,0 +1,843 @@
+# This module provides configuration for the PAM (Pluggable
+# Authentication Modules) system.
+
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  pam_p11 = pkgs.callPackage ./pam_p11.nix {};
+
+  parentConfig = config;
+
+  pamOpts = { config, name, ... }: let cfg = config; in let config = parentConfig; in {
+
+    options = {
+
+      name = mkOption {
+        example = "sshd";
+        type = types.str;
+        description = "Name of the PAM service.";
+      };
+
+      unixAuth = mkOption {
+        default = true;
+        type = types.bool;
+        description = ''
+          Whether users can log in with passwords defined in
+          <filename>/etc/shadow</filename>.
+        '';
+      };
+
+      rootOK = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          If set, root doesn't need to authenticate (e.g. for the
+          <command>useradd</command> service).
+        '';
+      };
+
+      p11Auth = mkOption {
+        default = config.security.pam.p11.enable;
+        type = types.bool;
+        description = ''
+          If set, keys listed in
+          <filename>~/.ssh/authorized_keys</filename> and
+          <filename>~/.eid/authorized_certificates</filename>
+          can be used to log in with the associated PKCS#11 tokens.
+        '';
+      };
+
+      u2fAuth = mkOption {
+        default = config.security.pam.u2f.enable;
+        type = types.bool;
+        description = ''
+          If set, users listed in
+          <filename>$XDG_CONFIG_HOME/Yubico/u2f_keys</filename> (or
+          <filename>$HOME/.config/Yubico/u2f_keys</filename> if XDG variable is
+          not set) are able to log in with the associated U2F key. Path can be
+          changed using <option>security.pam.u2f.authFile</option> option.
+        '';
+      };
+
+      yubicoAuth = mkOption {
+        default = config.security.pam.yubico.enable;
+        type = types.bool;
+        description = ''
+          If set, users listed in
+          <filename>~/.yubico/authorized_yubikeys</filename>
+          are able to log in with the associated Yubikey tokens.
+        '';
+      };
+
+      googleAuthenticator = {
+        enable = mkOption {
+          default = false;
+          type = types.bool;
+          description = ''
+            If set, users with enabled Google Authenticator (created
+            <filename>~/.google_authenticator</filename>) will be required
+            to provide Google Authenticator token to log in.
+          '';
+        };
+      };
+
+      usbAuth = mkOption {
+        default = config.security.pam.usb.enable;
+        type = types.bool;
+        description = ''
+          If set, users listed in
+          <filename>/etc/pamusb.conf</filename> are able to log in
+          with the associated USB key.
+        '';
+      };
+
+      otpwAuth = mkOption {
+        default = config.security.pam.enableOTPW;
+        type = types.bool;
+        description = ''
+          If set, the OTPW system will be used (if
+          <filename>~/.otpw</filename> exists).
+        '';
+      };
+
+      googleOsLoginAccountVerification = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          If set, will use the Google OS Login PAM modules
+          (<literal>pam_oslogin_login</literal>,
+          <literal>pam_oslogin_admin</literal>) to verify possible OS Login
+          users and set sudoers configuration accordingly.
+          This only makes sense to enable for the <literal>sshd</literal> PAM
+          service.
+        '';
+      };
+
+      googleOsLoginAuthentication = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          If set, will use the <literal>pam_oslogin_login</literal>'s user
+          authentication methods to authenticate users using 2FA.
+          This only makes sense to enable for the <literal>sshd</literal> PAM
+          service.
+        '';
+      };
+
+      fprintAuth = mkOption {
+        default = config.services.fprintd.enable;
+        type = types.bool;
+        description = ''
+          If set, fingerprint reader will be used (if exists and
+          your fingerprints are enrolled).
+        '';
+      };
+
+      oathAuth = mkOption {
+        default = config.security.pam.oath.enable;
+        type = types.bool;
+        description = ''
+          If set, the OATH Toolkit will be used.
+        '';
+      };
+
+      sshAgentAuth = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          If set, the calling user's SSH agent is used to authenticate
+          against the keys in the calling user's
+          <filename>~/.ssh/authorized_keys</filename>.  This is useful
+          for <command>sudo</command> on password-less remote systems.
+        '';
+      };
+
+      duoSecurity = {
+        enable = mkOption {
+          default = false;
+          type = types.bool;
+          description = ''
+            If set, use the Duo Security pam module
+            <literal>pam_duo</literal> for authentication.  Requires
+            configuration of <option>security.duosec</option> options.
+          '';
+        };
+      };
+
+      startSession = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          If set, the service will register a new session with
+          systemd's login manager.  For local sessions, this will give
+          the user access to audio devices, CD-ROM drives.  In the
+          default PolicyKit configuration, it also allows the user to
+          reboot the system.
+        '';
+      };
+
+      setEnvironment = mkOption {
+        type = types.bool;
+        default = true;
+        description = ''
+          Whether the service should set the environment variables
+          listed in <option>environment.sessionVariables</option>
+          using <literal>pam_env.so</literal>.
+        '';
+      };
+
+      setLoginUid = mkOption {
+        type = types.bool;
+        description = ''
+          Set the login uid of the process
+          (<filename>/proc/self/loginuid</filename>) for auditing
+          purposes.  The login uid is only set by ‘entry points’ like
+          <command>login</command> and <command>sshd</command>, not by
+          commands like <command>sudo</command>.
+        '';
+      };
+
+      forwardXAuth = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Whether X authentication keys should be passed from the
+          calling user to the target user (e.g. for
+          <command>su</command>)
+        '';
+      };
+
+      pamMount = mkOption {
+        default = config.security.pam.mount.enable;
+        type = types.bool;
+        description = ''
+          Enable PAM mount (pam_mount) system to mount fileystems on user login.
+        '';
+      };
+
+      allowNullPassword = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Whether to allow logging into accounts that have no password
+          set (i.e., have an empty password field in
+          <filename>/etc/passwd</filename> or
+          <filename>/etc/group</filename>).  This does not enable
+          logging into disabled accounts (i.e., that have the password
+          field set to <literal>!</literal>).  Note that regardless of
+          what the pam_unix documentation says, accounts with hashed
+          empty passwords are always allowed to log in.
+        '';
+      };
+
+      nodelay = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Wheather the delay after typing a wrong password should be disabled.
+        '';
+      };
+
+      requireWheel = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Whether to permit root access only to members of group wheel.
+        '';
+      };
+
+      limits = mkOption {
+        description = ''
+          Attribute set describing resource limits.  Defaults to the
+          value of <option>security.pam.loginLimits</option>.
+        '';
+      };
+
+      showMotd = mkOption {
+        default = false;
+        type = types.bool;
+        description = "Whether to show the message of the day.";
+      };
+
+      makeHomeDir = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Whether to try to create home directories for users
+          with <literal>$HOME</literal>s pointing to nonexistent
+          locations on session login.
+        '';
+      };
+
+      updateWtmp = mkOption {
+        default = false;
+        type = types.bool;
+        description = "Whether to update <filename>/var/log/wtmp</filename>.";
+      };
+
+      logFailures = mkOption {
+        default = false;
+        type = types.bool;
+        description = "Whether to log authentication failures in <filename>/var/log/faillog</filename>.";
+      };
+
+      enableAppArmor = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Enable support for attaching AppArmor profiles at the
+          user/group level, e.g., as part of a role based access
+          control scheme.
+        '';
+      };
+
+      enableKwallet = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          If enabled, pam_wallet will attempt to automatically unlock the
+          user's default KDE wallet upon login. If the user has no wallet named
+          "kdewallet", or the login password does not match their wallet
+          password, KDE will prompt separately after login.
+        '';
+      };
+      sssdStrictAccess = mkOption {
+        default = false;
+        type = types.bool;
+        description = "enforce sssd access control";
+      };
+
+      enableGnomeKeyring = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          If enabled, pam_gnome_keyring will attempt to automatically unlock the
+          user's default Gnome keyring upon login. If the user login password does
+          not match their keyring password, Gnome Keyring will prompt separately
+          after login.
+        '';
+      };
+
+      text = mkOption {
+        type = types.nullOr types.lines;
+        description = "Contents of the PAM service file.";
+      };
+
+    };
+
+    config = {
+      name = mkDefault name;
+      setLoginUid = mkDefault cfg.startSession;
+      limits = mkDefault config.security.pam.loginLimits;
+
+      # !!! TODO: move the LDAP stuff to the LDAP module, and the
+      # Samba stuff to the Samba module.  This requires that the PAM
+      # module provides the right hooks.
+      text = mkDefault
+        (''
+          # Account management.
+          account required pam_unix.so
+          ${optionalString use_ldap
+              "account sufficient ${pam_ldap}/lib/security/pam_ldap.so"}
+          ${optionalString (config.services.sssd.enable && cfg.sssdStrictAccess==false)
+              "account sufficient ${pkgs.sssd}/lib/security/pam_sss.so"}
+          ${optionalString (config.services.sssd.enable && cfg.sssdStrictAccess)
+              "account [default=bad success=ok user_unknown=ignore] ${pkgs.sssd}/lib/security/pam_sss.so"}
+          ${optionalString config.krb5.enable
+              "account sufficient ${pam_krb5}/lib/security/pam_krb5.so"}
+          ${optionalString cfg.googleOsLoginAccountVerification ''
+            account [success=ok ignore=ignore default=die] ${pkgs.google-compute-engine-oslogin}/lib/pam_oslogin_login.so
+            account [success=ok default=ignore] ${pkgs.google-compute-engine-oslogin}/lib/pam_oslogin_admin.so
+          ''}
+
+          # Authentication management.
+          ${optionalString cfg.googleOsLoginAuthentication
+              "auth [success=done perm_denied=bad default=ignore] ${pkgs.google-compute-engine-oslogin}/lib/pam_oslogin_login.so"}
+          ${optionalString cfg.rootOK
+              "auth sufficient pam_rootok.so"}
+          ${optionalString cfg.requireWheel
+              "auth required pam_wheel.so use_uid"}
+          ${optionalString cfg.logFailures
+              "auth required pam_tally.so"}
+          ${optionalString (config.security.pam.enableSSHAgentAuth && cfg.sshAgentAuth)
+              "auth sufficient ${pkgs.pam_ssh_agent_auth}/libexec/pam_ssh_agent_auth.so file=~/.ssh/authorized_keys:~/.ssh/authorized_keys2:/etc/ssh/authorized_keys.d/%u"}
+          ${optionalString cfg.fprintAuth
+              "auth sufficient ${pkgs.fprintd}/lib/security/pam_fprintd.so"}
+          ${let p11 = config.security.pam.p11; in optionalString cfg.p11Auth
+              "auth ${p11.control} ${pam_p11}/lib/security/pam_p11.so ${pkgs.opensc}/lib/opensc-pkcs11.so"}
+          ${let u2f = config.security.pam.u2f; in optionalString cfg.u2fAuth
+              "auth ${u2f.control} ${pkgs.pam_u2f}/lib/security/pam_u2f.so ${optionalString u2f.debug "debug"} ${optionalString (u2f.authFile != null) "authfile=${u2f.authFile}"} ${optionalString u2f.interactive "interactive"} ${optionalString u2f.cue "cue"}"}
+          ${optionalString cfg.usbAuth
+              "auth sufficient ${pkgs.pam_usb}/lib/security/pam_usb.so"}
+          ${let oath = config.security.pam.oath; in optionalString cfg.oathAuth
+              "auth requisite ${pkgs.oathToolkit}/lib/security/pam_oath.so window=${toString oath.window} usersfile=${toString oath.usersFile} digits=${toString oath.digits}"}
+          ${let yubi = config.security.pam.yubico; in optionalString cfg.yubicoAuth
+              "auth ${yubi.control} ${pkgs.yubico-pam}/lib/security/pam_yubico.so mode=${toString yubi.mode} ${optionalString (yubi.mode == "client") "id=${toString yubi.id}"} ${optionalString yubi.debug "debug"}"}
+        '' +
+          # Modules in this block require having the password set in PAM_AUTHTOK.
+          # pam_unix is marked as 'sufficient' on NixOS which means nothing will run
+          # after it succeeds. Certain modules need to run after pam_unix
+          # prompts the user for password so we run it once with 'required' at an
+          # earlier point and it will run again with 'sufficient' further down.
+          # We use try_first_pass the second time to avoid prompting password twice
+          (optionalString (cfg.unixAuth &&
+          (config.security.pam.enableEcryptfs
+            || cfg.pamMount
+            || cfg.enableKwallet
+            || cfg.enableGnomeKeyring
+            || cfg.googleAuthenticator.enable
+            || cfg.duoSecurity.enable)) ''
+              auth required pam_unix.so ${optionalString cfg.allowNullPassword "nullok"} ${optionalString cfg.nodelay "nodelay"} likeauth
+              ${optionalString config.security.pam.enableEcryptfs
+                "auth optional ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so unwrap"}
+              ${optionalString cfg.pamMount
+                "auth optional ${pkgs.pam_mount}/lib/security/pam_mount.so"}
+              ${optionalString cfg.enableKwallet
+                ("auth optional ${pkgs.plasma5.kwallet-pam}/lib/security/pam_kwallet5.so" +
+                 " kwalletd=${pkgs.libsForQt5.kwallet.bin}/bin/kwalletd5")}
+              ${optionalString cfg.enableGnomeKeyring
+                "auth optional ${pkgs.gnome3.gnome-keyring}/lib/security/pam_gnome_keyring.so"}
+              ${optionalString cfg.googleAuthenticator.enable
+                "auth required ${pkgs.googleAuthenticator}/lib/security/pam_google_authenticator.so no_increment_hotp"}
+              ${optionalString cfg.duoSecurity.enable
+                "auth required ${pkgs.duo-unix}/lib/security/pam_duo.so"}
+            '') + ''
+          ${optionalString cfg.unixAuth
+              "auth sufficient pam_unix.so ${optionalString cfg.allowNullPassword "nullok"} ${optionalString cfg.nodelay "nodelay"} likeauth try_first_pass"}
+          ${optionalString cfg.otpwAuth
+              "auth sufficient ${pkgs.otpw}/lib/security/pam_otpw.so"}
+          ${optionalString use_ldap
+              "auth sufficient ${pam_ldap}/lib/security/pam_ldap.so use_first_pass"}
+          ${optionalString config.services.sssd.enable
+              "auth sufficient ${pkgs.sssd}/lib/security/pam_sss.so use_first_pass"}
+          ${optionalString config.krb5.enable ''
+            auth [default=ignore success=1 service_err=reset] ${pam_krb5}/lib/security/pam_krb5.so use_first_pass
+            auth [default=die success=done] ${pam_ccreds}/lib/security/pam_ccreds.so action=validate use_first_pass
+            auth sufficient ${pam_ccreds}/lib/security/pam_ccreds.so action=store use_first_pass
+          ''}
+          auth required pam_deny.so
+
+          # Password management.
+          password sufficient pam_unix.so nullok sha512
+          ${optionalString config.security.pam.enableEcryptfs
+              "password optional ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so"}
+          ${optionalString cfg.pamMount
+              "password optional ${pkgs.pam_mount}/lib/security/pam_mount.so"}
+          ${optionalString use_ldap
+              "password sufficient ${pam_ldap}/lib/security/pam_ldap.so"}
+          ${optionalString config.services.sssd.enable
+              "password sufficient ${pkgs.sssd}/lib/security/pam_sss.so use_authtok"}
+          ${optionalString config.krb5.enable
+              "password sufficient ${pam_krb5}/lib/security/pam_krb5.so use_first_pass"}
+          ${optionalString config.services.samba.syncPasswordsByPam
+              "password optional ${pkgs.samba}/lib/security/pam_smbpass.so nullok use_authtok try_first_pass"}
+          ${optionalString cfg.enableGnomeKeyring
+              "password optional ${pkgs.gnome3.gnome-keyring}/lib/security/pam_gnome_keyring.so use_authtok"}
+
+          # Session management.
+          ${optionalString cfg.setEnvironment ''
+            session required pam_env.so conffile=${config.system.build.pamEnvironment} readenv=0
+          ''}
+          session required pam_unix.so
+          ${optionalString cfg.setLoginUid
+              "session ${
+                if config.boot.isContainer then "optional" else "required"
+              } pam_loginuid.so"}
+          ${optionalString cfg.makeHomeDir
+              "session required ${pkgs.pam}/lib/security/pam_mkhomedir.so silent skel=${config.security.pam.makeHomeDir.skelDirectory} umask=0022"}
+          ${optionalString cfg.updateWtmp
+              "session required ${pkgs.pam}/lib/security/pam_lastlog.so silent"}
+          ${optionalString config.security.pam.enableEcryptfs
+              "session optional ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so"}
+          ${optionalString use_ldap
+              "session optional ${pam_ldap}/lib/security/pam_ldap.so"}
+          ${optionalString config.services.sssd.enable
+              "session optional ${pkgs.sssd}/lib/security/pam_sss.so"}
+          ${optionalString config.krb5.enable
+              "session optional ${pam_krb5}/lib/security/pam_krb5.so"}
+          ${optionalString cfg.otpwAuth
+              "session optional ${pkgs.otpw}/lib/security/pam_otpw.so"}
+          ${optionalString cfg.startSession
+              "session optional ${pkgs.systemd}/lib/security/pam_systemd.so"}
+          ${optionalString cfg.forwardXAuth
+              "session optional pam_xauth.so xauthpath=${pkgs.xorg.xauth}/bin/xauth systemuser=99"}
+          ${optionalString (cfg.limits != [])
+              "session required ${pkgs.pam}/lib/security/pam_limits.so conf=${makeLimitsConf cfg.limits}"}
+          ${optionalString (cfg.showMotd && config.users.motd != null)
+              "session optional ${pkgs.pam}/lib/security/pam_motd.so motd=${motd}"}
+          ${optionalString cfg.pamMount
+              "session optional ${pkgs.pam_mount}/lib/security/pam_mount.so"}
+          ${optionalString (cfg.enableAppArmor && config.security.apparmor.enable)
+              "session optional ${pkgs.apparmor-pam}/lib/security/pam_apparmor.so order=user,group,default debug"}
+          ${optionalString (cfg.enableKwallet)
+              ("session optional ${pkgs.plasma5.kwallet-pam}/lib/security/pam_kwallet5.so" +
+               " kwalletd=${pkgs.libsForQt5.kwallet.bin}/bin/kwalletd5")}
+          ${optionalString (cfg.enableGnomeKeyring)
+              "session optional ${pkgs.gnome3.gnome-keyring}/lib/security/pam_gnome_keyring.so auto_start"}
+          ${optionalString (config.virtualisation.lxc.lxcfs.enable)
+               "session optional ${pkgs.lxc}/lib/security/pam_cgfs.so -c all"}
+        '');
+    };
+
+  };
+
+
+  inherit (pkgs) pam_krb5 pam_ccreds;
+
+  use_ldap = (config.users.ldap.enable && config.users.ldap.loginPam);
+  pam_ldap = if config.users.ldap.daemon.enable then pkgs.nss_pam_ldapd else pkgs.pam_ldap;
+
+  # Create a limits.conf(5) file.
+  makeLimitsConf = limits:
+    pkgs.writeText "limits.conf"
+       (concatMapStrings ({ domain, type, item, value }:
+         "${domain} ${type} ${item} ${toString value}\n")
+         limits);
+
+  motd = pkgs.writeText "motd" config.users.motd;
+
+  makePAMService = name: service:
+    { name = "pam.d/${name}";
+      value.source = pkgs.writeText "${name}.pam" service.text;
+    };
+
+in
+
+{
+
+  imports = [
+    (mkRenamedOptionModule [ "security" "pam" "enableU2F" ] [ "security" "pam" "u2f" "enable" ])
+  ];
+
+  ###### interface
+
+  options = {
+
+    security.pam.loginLimits = mkOption {
+      default = [];
+      example =
+        [ { domain = "ftp";
+            type   = "hard";
+            item   = "nproc";
+            value  = "0";
+          }
+          { domain = "@student";
+            type   = "-";
+            item   = "maxlogins";
+            value  = "4";
+          }
+       ];
+
+     description =
+       '' Define resource limits that should apply to users or groups.
+          Each item in the list should be an attribute set with a
+          <varname>domain</varname>, <varname>type</varname>,
+          <varname>item</varname>, and <varname>value</varname>
+          attribute.  The syntax and semantics of these attributes
+          must be that described in the limits.conf(5) man page.
+
+          Note that these limits do not apply to systemd services,
+          whose limits can be changed via <option>systemd.extraConfig</option>
+          instead.
+       '';
+    };
+
+    security.pam.services = mkOption {
+      default = [];
+      type = with types; loaOf (submodule pamOpts);
+      description =
+        ''
+          This option defines the PAM services.  A service typically
+          corresponds to a program that uses PAM,
+          e.g. <command>login</command> or <command>passwd</command>.
+          Each attribute of this set defines a PAM service, with the attribute name
+          defining the name of the service.
+        '';
+    };
+
+    security.pam.makeHomeDir.skelDirectory = mkOption {
+      type = types.str;
+      default = "/var/empty";
+      example =  "/etc/skel";
+      description = ''
+        Path to skeleton directory whose contents are copied to home
+        directories newly created by <literal>pam_mkhomedir</literal>.
+      '';
+    };
+
+    security.pam.enableSSHAgentAuth = mkOption {
+      type = types.bool;
+      default = false;
+      description =
+        ''
+          Enable sudo logins if the user's SSH agent provides a key
+          present in <filename>~/.ssh/authorized_keys</filename>.
+          This allows machines to exclusively use SSH keys instead of
+          passwords.
+        '';
+    };
+
+    security.pam.enableOTPW = mkEnableOption "the OTPW (one-time password) PAM module";
+
+    security.pam.p11 = {
+      enable = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Enables P11 PAM (<literal>pam_p11</literal>) module.
+
+          If set, users can log in with SSH keys and PKCS#11 tokens.
+
+          More information can be found <link
+          xlink:href="https://github.com/OpenSC/pam_p11">here</link>.
+        '';
+      };
+
+      control = mkOption {
+        default = "sufficient";
+        type = types.enum [ "required" "requisite" "sufficient" "optional" ];
+        description = ''
+          This option sets pam "control".
+          If you want to have multi factor authentication, use "required".
+          If you want to use the PKCS#11 device instead of the regular password,
+          use "sufficient".
+
+          Read
+          <citerefentry>
+            <refentrytitle>pam.conf</refentrytitle>
+            <manvolnum>5</manvolnum>
+          </citerefentry>
+          for better understanding of this option.
+        '';
+      };
+    };
+
+    security.pam.u2f = {
+      enable = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Enables U2F PAM (<literal>pam-u2f</literal>) module.
+
+          If set, users listed in
+          <filename>$XDG_CONFIG_HOME/Yubico/u2f_keys</filename> (or
+          <filename>$HOME/.config/Yubico/u2f_keys</filename> if XDG variable is
+          not set) are able to log in with the associated U2F key. The path can
+          be changed using <option>security.pam.u2f.authFile</option> option.
+
+          File format is:
+          <literal>username:first_keyHandle,first_public_key: second_keyHandle,second_public_key</literal>
+          This file can be generated using <command>pamu2fcfg</command> command.
+
+          More information can be found <link
+          xlink:href="https://developers.yubico.com/pam-u2f/">here</link>.
+        '';
+      };
+
+      authFile = mkOption {
+        default = null;
+        type = with types; nullOr path;
+        description = ''
+          By default <literal>pam-u2f</literal> module reads the keys from
+          <filename>$XDG_CONFIG_HOME/Yubico/u2f_keys</filename> (or
+          <filename>$HOME/.config/Yubico/u2f_keys</filename> if XDG variable is
+          not set).
+
+          If you want to change auth file locations or centralize database (for
+          example use <filename>/etc/u2f-mappings</filename>) you can set this
+          option.
+
+          File format is:
+          <literal>username:first_keyHandle,first_public_key: second_keyHandle,second_public_key</literal>
+          This file can be generated using <command>pamu2fcfg</command> command.
+
+          More information can be found <link
+          xlink:href="https://developers.yubico.com/pam-u2f/">here</link>.
+        '';
+      };
+
+      control = mkOption {
+        default = "sufficient";
+        type = types.enum [ "required" "requisite" "sufficient" "optional" ];
+        description = ''
+          This option sets pam "control".
+          If you want to have multi factor authentication, use "required".
+          If you want to use U2F device instead of regular password, use "sufficient".
+
+          Read
+          <citerefentry>
+            <refentrytitle>pam.conf</refentrytitle>
+            <manvolnum>5</manvolnum>
+          </citerefentry>
+          for better understanding of this option.
+        '';
+      };
+
+      debug = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Debug output to stderr.
+        '';
+      };
+
+      interactive = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Set to prompt a message and wait before testing the presence of a U2F device.
+          Recommended if your device doesn’t have a tactile trigger.
+        '';
+      };
+
+      cue = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          By default <literal>pam-u2f</literal> module does not inform user
+          that he needs to use the u2f device, it just waits without a prompt.
+
+          If you set this option to <literal>true</literal>,
+          <literal>cue</literal> option is added to <literal>pam-u2f</literal>
+          module and reminder message will be displayed.
+        '';
+      };
+    };
+
+    security.pam.yubico = {
+      enable = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Enables Yubico PAM (<literal>yubico-pam</literal>) module.
+
+          If set, users listed in
+          <filename>~/.yubico/authorized_yubikeys</filename>
+          are able to log in with the associated Yubikey tokens.
+
+          The file must have only one line:
+          <literal>username:yubikey_token_id1:yubikey_token_id2</literal>
+          More information can be found <link
+          xlink:href="https://developers.yubico.com/yubico-pam/">here</link>.
+        '';
+      };
+      control = mkOption {
+        default = "sufficient";
+        type = types.enum [ "required" "requisite" "sufficient" "optional" ];
+        description = ''
+          This option sets pam "control".
+          If you want to have multi factor authentication, use "required".
+          If you want to use Yubikey instead of regular password, use "sufficient".
+
+          Read
+          <citerefentry>
+            <refentrytitle>pam.conf</refentrytitle>
+            <manvolnum>5</manvolnum>
+          </citerefentry>
+          for better understanding of this option.
+        '';
+      };
+      id = mkOption {
+        example = "42";
+        type = types.str;
+        description = "client id";
+      };
+
+      debug = mkOption {
+        default = false;
+        type = types.bool;
+        description = ''
+          Debug output to stderr.
+        '';
+      };
+      mode = mkOption {
+        default = "client";
+        type = types.enum [ "client" "challenge-response" ];
+        description = ''
+          Mode of operation.
+
+          Use "client" for online validation with a YubiKey validation service such as
+          the YubiCloud.
+
+          Use "challenge-response" for offline validation using YubiKeys with HMAC-SHA-1
+          Challenge-Response configurations. See the man-page ykpamcfg(1) for further
+          details on how to configure offline Challenge-Response validation.
+
+          More information can be found <link
+          xlink:href="https://developers.yubico.com/yubico-pam/Authentication_Using_Challenge-Response.html">here</link>.
+        '';
+      };
+    };
+
+    security.pam.enableEcryptfs = mkEnableOption "eCryptfs PAM module (mounting ecryptfs home directory on login)";
+
+    users.motd = mkOption {
+      default = null;
+      example = "Today is Sweetmorn, the 4th day of The Aftermath in the YOLD 3178.";
+      type = types.nullOr types.lines;
+      description = "Message of the day shown to users when they log in.";
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = {
+
+    environment.systemPackages =
+      # Include the PAM modules in the system path mostly for the manpages.
+      [ pkgs.pam ]
+      ++ optional config.users.ldap.enable pam_ldap
+      ++ optional config.services.sssd.enable pkgs.sssd
+      ++ optionals config.krb5.enable [pam_krb5 pam_ccreds]
+      ++ optionals config.security.pam.enableOTPW [ pkgs.otpw ]
+      ++ optionals config.security.pam.oath.enable [ pkgs.oathToolkit ]
+      ++ optionals config.security.pam.p11.enable [ pam_p11 ]
+      ++ optionals config.security.pam.u2f.enable [ pkgs.pam_u2f ];
+
+    boot.supportedFilesystems = optionals config.security.pam.enableEcryptfs [ "ecryptfs" ];
+
+    security.wrappers = {
+      unix_chkpwd = {
+        source = "${pkgs.pam}/sbin/unix_chkpwd.orig";
+        owner = "root";
+        setuid = true;
+      };
+    };
+
+    environment.etc = mapAttrs' makePAMService config.security.pam.services;
+
+    security.pam.services =
+      { other.text =
+          ''
+            auth     required pam_warn.so
+            auth     required pam_deny.so
+            account  required pam_warn.so
+            account  required pam_deny.so
+            password required pam_warn.so
+            password required pam_deny.so
+            session  required pam_warn.so
+            session  required pam_deny.so
+          '';
+
+        # Most of these should be moved to specific modules.
+        i3lock = {};
+        i3lock-color = {};
+        vlock = {};
+        xlock = {};
+        xscreensaver = {};
+
+        runuser = { rootOK = true; unixAuth = false; setEnvironment = false; };
+
+        /* FIXME: should runuser -l start a systemd session? Currently
+           it complains "Cannot create session: Already running in a
+           session". */
+        runuser-l = { rootOK = true; unixAuth = false; };
+      };
+
+  };
+
+}
--- a/nixops/pam_p11/pam_p11.nix
+++ b/nixops/pam_p11/pam_p11.nix
@ -0,0 +1,23 @@
+{ stdenv, fetchFromGitHub, autoreconfHook, pkg-config, openssl, libp11, pam }:
+
+stdenv.mkDerivation rec {
+  pname = "pam_p11";
+  version = "0.3.1";
+
+  src = fetchFromGitHub {
+    owner = "OpenSC";
+    repo = "pam_p11";
+    rev = "pam_p11-${version}";
+    sha256 = "1caidy18rq5zk82d51x8vwidmkhwmanf3qm25x1yrdlbhxv6m7lk";
+  };
+
+  patchPhase =
+    ''
+    substituteInPlace src/match_openssh.c --replace \
+      '"%s/.ssh/authorized_keys", pw->pw_dir)' \
+      '"/etc/ssh/authorized_keys.d/%s", pw->pw_name)'
+    '';
+
+  nativeBuildInputs = [ autoreconfHook pkg-config ];
+  buildInputs = [ pam openssl libp11 ];
+}
--- a/nixops/rc-hardware-configuration.nix
+++ b/nixops/rc-hardware-configuration.nix
@ -1,50 +0,0 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, modulesPath, ... }:
-
-{
-  imports =
-    [ (modulesPath + "/installer/scan/not-detected.nix")
-    ];
-
-  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "usbhid" "sd_mod" "rtsx_usb_sdmmc" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/348c924c-1d86-44ff-84af-2594f414e7d0";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/1BDC-44BB";
-      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
-    };
-
-  fileSystems."/opt" =
-    { device = "/dev/disk/by-uuid/cf0f51b6-7b95-4c74-9390-37dc4c86f32b";
-      fsType = "ext4";
-    };
-
-  swapDevices = [ ];
-
-  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
-  # (the default) this is the recommended approach. When using systemd-networkd it's
-  # still possible to use this option, but it's recommended to use it in conjunction
-  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
-  networking.useDHCP = lib.mkDefault true;
-  # networking.interfaces.enp1s0.useDHCP = lib.mkDefault true;
-  # networking.interfaces.wlp2s0.useDHCP = lib.mkDefault true;
-
-  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
-
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-
-  hardware.cpu.intel.updateMicrocode = true;
-
-  system.stateVersion = "23.11";
-}
--- a/nixops/rpi.nix
+++ b/nixops/rpi.nix
@ -1,22 +1,32 @@
-{ host, rpi4, experimental-users ? false }:
+{ host, rpi4 }:

 { config, pkgs, ... }:
 let
-  artiq = builtins.getFlake git+https://github.com/m-labs/artiq.git;
+  m-labs = import (fetchTarball https://nixbld.m-labs.hk/channel/custom/artiq/full/artiq-full/nixexprs.tar.xz) { inherit pkgs; };
 in
 {
  deployment.targetHost = host;
-  deployment.hasFastConnection = true;
-  nix.nixPath = [ "nixpkgs=${pkgs.path}" ];
-  programs.command-not-found.dbPath = "${pkgs.path}/programs.sqlite";
  nixpkgs.system = "aarch64-linux";

  boot.loader.grub.enable = false;
-  boot.loader.generic-extlinux-compatible.enable = true;
-  boot.kernelParams = if rpi4 then ["cma=64M"] else []; # work around https://github.com/raspberrypi/linux/issues/3208
-  boot.initrd.includeDefaultModules = false;

-  fileSystems = {
+  boot.loader.generic-extlinux-compatible.enable = !rpi4;
+  boot.loader.raspberryPi = pkgs.lib.mkIf rpi4 {
+    enable = true;
+    version = 4;
+  };
+  boot.kernelPackages = pkgs.lib.mkIf rpi4 pkgs.linuxPackages_latest;
+
+  fileSystems = if rpi4 then {
+    "/boot" = {
+      device = "/dev/disk/by-label/FIRMWARE";
+      fsType = "vfat";
+    };
+    "/" = {
+      device = "/dev/disk/by-label/NIXOS_SD";
+      fsType = "ext4";
+    };
+  } else {
    "/" = {
      device = "/dev/disk/by-label/NIXOS_SD";
      fsType = "ext4";
@ -24,51 +34,30 @@ in
  };

  services.openssh.enable = true;
-  services.openssh.authorizedKeysInHomedir = false;
-  services.openssh.settings.PasswordAuthentication = false;
-  services.openssh.settings.GatewayPorts = "clientspecified";
-  services.openssh.extraConfig =
-    ''
-    StreamLocalBindUnlink yes
-    '';
-  programs.mosh.enable = true;
+  services.openssh.passwordAuthentication = false;

  networking.hostName = host;
-
  time.timeZone = "Asia/Hong_Kong";

  users.extraGroups.plugdev = { };
  users.mutableUsers = false;
  users.defaultUserShell = pkgs.fish;
  users.extraUsers = (import ./common-users.nix { inherit pkgs; }) // {
-    nixbld = {
+    nix = {
      isNormalUser = true;
-      extraGroups = ["plugdev" "dialout"];
-      openssh.authorizedKeys.keys = [
-        "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGJGICdNM9mHHAa1Cxk9Wz3YLkIEeqrIQGxM0aoy1g5O"
-      ];
    };
  };
  security.sudo.wheelNeedsPassword = false;
-  services.udev.packages = [ artiq.packages.aarch64-linux.openocd-bscanspi ];
-  services.udev.extraRules = (import ./extra-udev.nix);
+  services.udev.packages = [ m-labs.openocd ];

  documentation.enable = false;
  environment.systemPackages = with pkgs; [
-    psmisc wget vim git sshfs usbutils uhubctl lm_sensors file mosh tmux
-    artiq.packages.aarch64-linux.openocd-bscanspi
-    xc3sprog
-    screen gdb minicom picocom
+    psmisc wget vim git usbutils lm_sensors file telnet mosh tmux xc3sprog m-labs.openocd screen gdb minicom picocom
  ];
-  programs.zsh.enable = true;
  programs.fish.enable = true;
  programs.wireshark.enable = true;

-  nix.settings.trusted-public-keys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
-  nix.settings.substituters = ["https://nixbld.m-labs.hk?priority=10"];
-  nix.settings.trusted-users = ["root" "sb"];
-
-  nix.extraOptions = ''
-    experimental-features = nix-command flakes impure-derivations
-  '';
+  nix.binaryCachePublicKeys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
+  nix.binaryCaches = ["https://cache.nixos.org" "https://nixbld.m-labs.hk"];
+  nix.trustedUsers = ["root" "nix"];
 }
--- a/nixops/saturn-hardware-configuration.nix
+++ b/nixops/saturn-hardware-configuration.nix
@ -1,43 +0,0 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, modulesPath, ... }:
-
-{
-  imports =
-    [ (modulesPath + "/installer/scan/not-detected.nix")
-    ];
-
-  boot.initrd.availableKernelModules = [ "xhci_pci" "thunderbolt" "ahci" "nvme" "usbhid" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/51d521ec-4807-4b71-8a89-116b89f72d2e";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/877D-AF6A";
-      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
-    };
-
-  swapDevices = [ ];
-
-  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
-  # (the default) this is the recommended approach. When using systemd-networkd it's
-  # still possible to use this option, but it's recommended to use it in conjunction
-  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
-  networking.useDHCP = lib.mkDefault true;
-  # networking.interfaces.enp86s0.useDHCP = lib.mkDefault true;
-
-  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
-  hardware.cpu.intel.updateMicrocode = true;
-  
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-  
-  system.stateVersion = "24.05";
-}
--- a/nixops/vulcan-hardware-configuration.nix
+++ b/nixops/vulcan-hardware-configuration.nix
@ -1,41 +0,0 @@
-{ config, lib, pkgs, modulesPath, ... }:
-
-{
-  imports =
-    [ (modulesPath + "/installer/scan/not-detected.nix")
-    ];
-
-  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usbhid" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/67168ae0-6448-4b40-b278-406290224b4f";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/8F4B-AD84";
-      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
-    };
-
-  swapDevices = [ ];
-
-  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
-  # (the default) this is the recommended approach. When using systemd-networkd it's
-  # still possible to use this option, but it's recommended to use it in conjunction
-  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
-  networking.useDHCP = lib.mkDefault true;
-  # networking.interfaces.eno1.useDHCP = lib.mkDefault true;
-
-  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
-
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-
-  hardware.cpu.intel.updateMicrocode = true;
-  
-  system.stateVersion = "23.05";
-}
--- a/nixops/zeus-hardware-configuration.nix
+++ b/nixops/zeus-hardware-configuration.nix
@ -1,3 +1,6 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
 { config, lib, pkgs, ... }:

 {
@ -18,18 +21,13 @@
  fileSystems."/boot" =
    { device = "/dev/disk/by-uuid/91B4-E546";
      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
    };

  swapDevices = [ ];

-  nix.settings.max-jobs = lib.mkDefault 16;
+  nix.maxJobs = lib.mkDefault 16;
  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";

  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
-
-  hardware.cpu.intel.updateMicrocode = true;
-
-  system.stateVersion = "19.03";
 }
--- a/remote-ipsec.txt
+++ b/remote-ipsec.txt
@ -1,49 +0,0 @@
-connections {
-  bypass-ipsec {
-    remote_addrs = 127.0.0.1
-    children {
-      bypass-isakmp-v4 {
-        local_ts = 0.0.0.0/0[udp/isakmp]
-        remote_ts = 0.0.0.0/0[udp/isakmp]
-        mode = pass
-        start_action = trap
-      }
-      bypass-isakmp-v6 {
-        local_ts = ::/0[udp/isakmp]
-        remote_ts = ::/0[udp/isakmp]
-        mode = pass
-        start_action = trap
-      }
-    }
-  }
-  m_labs {
-    version = 2
-    encap = no
-    mobike = no
-    send_certreq = no
-    proposals = aes128gcm128-sha256-prfsha256-curve25519,aes128gcm128-sha256-prfsha256-ecp256
-    local_addrs = 103.206.98.1
-    remote_addrs = 94.190.212.123
-    local {
-      auth = pubkey
-      id = fqdn:igw0.hkg.as150788.net
-      pubkeys = igw0.hkg.as150788.net
-    }
-    remote {
-      auth = pubkey
-      id = fqdn:m-labs.hk
-      pubkeys = m-labs.hk
-    }
-    children {
-      con1 {
-        mode = transport
-        ah_proposals = sha256-curve25519,sha256-ecp256
-        esp_proposals =
-        local_ts = 103.206.98.1[gre]
-        remote_ts = 94.190.212.123[gre]
-        start_action = none
-        close_action = none
-      }
-    }
-  }
-}
--- a/vlan-settings-1.png
+++ b/vlan-settings-1.png
--- a/vlan-settings-2.png
+++ b/vlan-settings-2.png
--- a/vlan-settings-3.png
+++ b/vlan-settings-3.png