hydra: broaden allowedUris to m-labs repos

2022-02-07 11:04:04 +08:00
60 changed files with 1038 additions and 12090 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 $MAINPID";
-      };
-      path = [ pkgs.nix pkgs.git ];
-    };
-
-    security.acme.certs."afws.m-labs.hk".postRun =
-      ''
-      mkdir -p /var/lib/afws/cert
-      cp cert.pem /var/lib/afws/cert
-      cp key.pem /var/lib/afws/cert
-      chown -R afws:afws /var/lib/afws/cert
-      '';
-    security.acme.certs."afws.m-labs.hk".reloadServices = [ "afws.service" ];
-
-    users.users.afws = {
-      name = "afws";
-      group = "afws";
-      description = "AFWS server user";
-      isSystemUser = true;
-      createHome = false;
-      home = "/var/lib/afws";
-      useDefaultShell = true;
-    };
-    users.extraGroups.afws = {};
-  };
-}
--- a/nixbld-etc-nixos/backup-module.nix
+++ b/nixbld-etc-nixos/backup-module.nix
@ -1,37 +1,31 @@
 { config, pkgs, lib, ... }:
 with lib;
 let
-  excludePaths = [
-    "/var/lib/gitea/repositories/*/*.git/archives"
-    "/var/lib/gitea/data/repo-archive"
-    "/var/lib/gitea/data/indexers"
-    "/var/vmail/m-labs.hk/js"
-    "/var/lib/afws/.cache"
-    "/var/lib/mattermost/data/2019*"
-    "/var/lib/mattermost/data/2020*"
-    "/var/lib/mattermost/data/2021*"
-    "/var/lib/mattermost/data/2022*"
-    "/var/lib/mattermost/data/2023*"
-  ];
  makeBackup = pkgs.writeScript "make-backup" ''
-    #!${pkgs.bash}/bin/bash -p
+    #!${pkgs.bash}/bin/bash

    set -e
    umask 0077

+    FILENAME=backup-`date +%F`.tar.bz2.gpg
+
    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
+    ${pkgs.sudo}/bin/sudo -u rt ${config.services.postgresql.package}/bin/pg_dump rt5 > rt.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" --exclude "/var/lib/gitea/data/repo-archive" /etc/nixos /var/lib/gitea /var/lib/mattermost/data flarum.sql mattermost.sql rt.sql | \
        ${pkgs.bzip2}/bin/bzip2 | \
-        ${pkgs.gnupg}/bin/gpg --symmetric --batch --passphrase-fd 6
+        ${pkgs.gnupg}/bin/gpg --symmetric --batch --passphrase-file /etc/nixos/secret/backup-passphrase > /home/backupdl/$FILENAME
+
+    popd
+    rm -rf $DBDUMPDIR
+
+    chown backupdl.users /home/backupdl/$FILENAME
+
+    echo Backup done
  '';
  cfg = config.services.mlabs-backup;
 in
@ -45,20 +39,20 @@ in
  };

  config = mkIf cfg.enable {
-    users.extraGroups.backupdl = { };
-    users.extraUsers.backupdl = {
-      isNormalUser = true;
-      extraGroups = ["backupdl" "nextcloud"];
-      openssh.authorizedKeys.keys = [
-        "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABgQCbH+l0FIBTPdUKOS9H5OOT5ro/nljKLsiCTzTzublCScdPPmCNy27ORbLgNHX5Ughlug5wr2rAIU9AexV+L71V5MeVHUWDfKgRsNIpUTtY6wpJkAP7r1ipk2kTWc/sxhrxyPea62cohmy1dOeLlwXO6U8FnsiZfYKmgjZ8wuTo6ixDB8krXsAZ8VY/bj5WFcXqeW8GF1Qjpel7HgpCpj3HIUyC63uwIyUoYe+cgnhjzNLbRYdU9Yx2iqcUCwEUX2cMdz5VX+xbLkL8CWcuiMFg6TFo+CUPFtuA/kVzHcZ4Pa3BiilL3rf7oXlIXGN12JVsN+caX7j2weVqm2b5u5eVsyDxiLx1KA37ukq92CYAAdOuKE+saMPsLuOn+Qd9B6D5oYnYgsWg460uEGgwczwOTXLAZTT5wrwRaKIE+ezKqtRP+Tz7l2IEixulyj1MUR+XpSwECZXiFJx5DGofwzxcd2kWnNOPBReDkHv0At5ZLNIrLuxFMz2L6UXbqvHwEu8= backupdl@minipc"
-      ];
+    systemd.services.mlabs-backup = {
+      description = "M-Labs backup";
+      serviceConfig = {
+        Type = "oneshot";
+        User = "root";
+        Group = "root";
+        ExecStart = "${makeBackup}";
+      };
    };
-    security.wrappers.mlabs-backup = {
-      source = makeBackup;
-      setuid = true;
-      owner = "root";
-      group = "backupdl";
-      permissions = "g+x";
+
+    systemd.timers.mlabs-backup = {
+      description = "M-Labs backup";
+      wantedBy = [ "timers.target" ];
+      timerConfig.OnCalendar = "tuesday,friday";
    };
  };
 }
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
--- a/nixbld-etc-nixos/flarum/composer.lock
+++ b/nixbld-etc-nixos/flarum/composer.lock
--- a/nixbld-etc-nixos/flarum/default.nix
+++ b/nixbld-etc-nixos/flarum/default.nix
@ -1,39 +0,0 @@
-{
-  lib,
-  php,
-  fetchFromGitHub,
-  fetchpatch,
-}:
-
-php.buildComposerProject (finalAttrs: {
-  pname = "flarum";
-  version = "1.8.1";
-
-  src = fetchFromGitHub {
-    owner = "flarum";
-    repo = "flarum";
-    rev = "v${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-GLE5ZtzZmQ8YbitV6LG744QHoGxlj5TfC5wP2a3eFpU=";
-
-  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/hydra-hack-allowed-uris.patch
+++ b/nixbld-etc-nixos/hydra-hack-allowed-uris.patch
@ -0,0 +1,13 @@
+diff --git a/src/hydra-eval-jobs/hydra-eval-jobs.cc b/src/hydra-eval-jobs/hydra-eval-jobs.cc
+index 934bf42e..48f2d248 100644
+--- a/src/hydra-eval-jobs/hydra-eval-jobs.cc
+++ b/src/hydra-eval-jobs/hydra-eval-jobs.cc
+@@ -281,6 +281,8 @@ int main(int argc, char * * argv)
+            to the environment. */
+         evalSettings.restrictEval = true;
+ 
+        evalSettings.allowedUris = {"https://github.com/m-labs/ https://git.m-labs.hk/m-labs/"};
+
+         /* When building a flake, use pure evaluation (no access to
+            'getEnv', 'currentSystem' etc. */
+         evalSettings.pureEval = myArgs.flake;
--- 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"
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-+       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"
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-+       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/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-3-networked-derivations.patch
+++ b/nixbld-etc-nixos/nix-3-networked-derivations.patch
@ -0,0 +1,82 @@
+diff -Naur /nix/store/32wd1lrf55ymaz1aysrqffpxfgkwl6m4-source/src/libstore/build/local-derivation-goal.cc nix3/src/libstore/build/local-derivation-goal.cc
+--- /nix/store/32wd1lrf55ymaz1aysrqffpxfgkwl6m4-source/src/libstore/build/local-derivation-goal.cc	1970-01-01 08:00:01.000000000 +0800
+++ nix3/src/libstore/build/local-derivation-goal.cc	2021-04-24 16:29:52.493166702 +0800
+@@ -395,6 +395,8 @@
+     additionalSandboxProfile = parsedDrv->getStringAttr("__sandboxProfile").value_or("");
+ #endif
+ 
+    networked = parsedDrv->getBoolAttr("__networked");
+
+     /* Are we doing a chroot build? */
+     {
+         auto noChroot = parsedDrv->getBoolAttr("__noChroot");
+@@ -412,7 +414,7 @@
+         else if (settings.sandboxMode == smDisabled)
+             useChroot = false;
+         else if (settings.sandboxMode == smRelaxed)
+-            useChroot = !(derivationIsImpure(derivationType)) && !noChroot;
+            useChroot = !allowNetwork() && !(derivationIsImpure(derivationType)) && !noChroot;
+     }
+ 
+     auto & localStore = getLocalStore();
+@@ -623,7 +625,7 @@
+                 "nogroup:x:65534:\n", sandboxGid()));
+ 
+         /* Create /etc/hosts with localhost entry. */
+-        if (!(derivationIsImpure(derivationType)))
+        if (!allowNetwork() && !(derivationIsImpure(derivationType)))
+             writeFile(chrootRootDir + "/etc/hosts", "127.0.0.1 localhost\n::1 localhost\n");
+ 
+         /* Make the closure of the inputs available in the chroot,
+@@ -810,7 +812,7 @@
+            us.
+         */
+ 
+-        if (!(derivationIsImpure(derivationType)))
+        if (!allowNetwork() && !(derivationIsImpure(derivationType)))
+             privateNetwork = true;
+ 
+         userNamespaceSync.create();
+@@ -1066,7 +1068,7 @@
+        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 (derivationIsImpure(derivationType)) {
+    if (allowNetwork() || derivationIsImpure(derivationType)) {
+         for (auto & i : parsedDrv->getStringsAttr("impureEnvVars").value_or(Strings()))
+             env[i] = getEnv(i).value_or("");
+     }
+@@ -1702,7 +1704,7 @@
+             /* Fixed-output derivations typically need to access the
+                network, so give them access to /etc/resolv.conf and so
+                on. */
+-            if (derivationIsImpure(derivationType)) {
+            if (allowNetwork() || derivationIsImpure(derivationType)) {
+                 // 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
+@@ -1943,7 +1945,7 @@
+ 
+                 sandboxProfile += "(import \"sandbox-defaults.sb\")\n";
+ 
+-                if (derivationIsImpure(derivationType))
+                if (allowNetwork() || derivationIsImpure(derivationType))
+                     sandboxProfile += "(import \"sandbox-network.sb\")\n";
+ 
+                 /* Add the output paths we'll use at build-time to the chroot */
+diff -Naur /nix/store/32wd1lrf55ymaz1aysrqffpxfgkwl6m4-source/src/libstore/build/local-derivation-goal.hh nix3/src/libstore/build/local-derivation-goal.hh
+--- /nix/store/32wd1lrf55ymaz1aysrqffpxfgkwl6m4-source/src/libstore/build/local-derivation-goal.hh	1970-01-01 08:00:01.000000000 +0800
+++ nix3/src/libstore/build/local-derivation-goal.hh	2021-04-24 16:35:23.060968488 +0800
+@@ -40,6 +40,12 @@
+ 
+     Path chrootRootDir;
+ 
+    bool networked;
+    bool allowNetwork()
+    {
+        return derivationIsFixed(drv->type()) || networked;
+    }
+
+     /* RAII object to delete the chroot directory. */
+     std::shared_ptr<AutoDelete> autoDelChroot;
+ 
--- 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.nix
+++ b/nixbld-etc-nixos/rt.nix
@ -19,9 +19,14 @@ let
      Set($Timezone, '${cfg.timeZone}');

      Set($DatabaseType, 'Pg');
-      Set($DatabaseHost, '/run/postgresql');
-      Set($DatabaseUser, 'rt');
+      Set($DatabaseHost, 'localhost');
+      Set($DatabaseUser, 'rt_user');
      Set($DatabaseName, 'rt5');
+      # Read database password from file
+      open my $fh, '<', '${cfg.dbPasswordFile}' or die 'Can\'t open file $!';
+      my $dbpw = do { local $/; <$fh> };
+      $dbpw =~ s/^\s+|\s+$//g;
+      Set($DatabasePassword, $dbpw);

      # System (Logging)
      Set($LogToSTDERR, undef); # Don't log twice
@ -30,7 +35,7 @@ let
      Set($OwnerEmail, '${cfg.ownerEmail}');
      Set($MaxAttachmentSize, 15360000);
      Set($CheckMoreMSMailHeaders, 1);
-      Set($RTAddressRegexp, '^(helpdesk)\@(m-labs.hk|m-labs-intl.com)$');
+      Set($RTAddressRegexp, '^(helpdesk|sales)\@(m-labs.hk)$');
      Set($LoopsToRTOwner, 0);

      # System (Outgoing mail)
@ -149,6 +154,13 @@ in {
      type = str;
    };

+    dbPasswordFile = mkOption {
+      description = "File containing the database password";
+      type = str;
+      default = "/etc/nixos/secret/rtpasswd";
+      internal = true;
+    };
+
    domain = mkOption {
      description = "Which domain RT is running on";
      type = str;
@ -233,6 +245,8 @@ in {

          PrivateNetwork = false;
          MemoryDenyWriteExecute = false;
+
+          ReadOnlyPaths = [ cfg.dbPasswordFile ];
        };

        environment = {
--- 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
@ -18,18 +18,15 @@
  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 +1,31 @@
+{ 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"];
+
+  system.stateVersion = "19.03";
+}
--- a/nixops/common-users.nix
+++ b/nixops/common-users.nix
@ -3,16 +3,16 @@
 {
  root = {
    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBF/YybP+fQ0J+bNqM5Vgx5vDmVqVWsgUdF1moUxghv7d73GZAFaM6IFBdrXTAa33AwnWwDPMrTgP1V6SXBkb3ciJo/lD1urJGbydbSI5Ksq9d59wvOeANvyWYrQw6+eqTQ=="
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBDf6+TFaUtITiiU7b6DOiT4/C8fzCq70j9DGnNyo/+5bS7ffRezTS0AqqltHQs9/lbjUbtP+Iil7RUGF0o0X6v5y/Gt/GdV9QR+Nv1mJCF1KVOeMKm/vB0jjN+ncwHU+BA=="
+      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCyPk5WyFoWSvF4ozehxcVBoZ+UHgrI7VW/OoQfFFwIQe0qvetUZBMZwR2FwkLPAMZV8zz1v4EfncudEkVghy4P+/YVLlDjqDq9zwZnh8Nd/ifu84wmcNWHT2UcqnhjniCdshL8a44memzABnxfLLv+sXhP2x32cJAamo5y6fukr2qLp2jbXzR+3sv3klE0ruUXis/BR1lLqNJEYP8jB6fLn2sLKinnZPfn6DwVOk10mGeQsdME/eGl3phpjhODH9JW5V2V5nJBbC0rBnq+78dyArKVqjPSmIcSy72DEIpTctnMEN1W34BGrnsDd5Xd/DKxKxHKTMCHtZRwLC2X0NWN"
+      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCMALVC8RDTHec+PC8y1s3tcpUAODgq6DEzQdHDf/cyvDMfmCaPiMxfIdmkns5lMa03hymIfSmLUF0jFFDc7biRp7uf9AAXNsrTmplHii0l0McuOOZGlSdZM4eL817P7UwJqFMxJyFXDjkubhQiX6kp25Kfuj/zLnupRCaiDvE7ho/xay6Jrv0XLz935TPDwkc7W1asLIvsZLheB+sRz9SMOb9gtrvk5WXZl5JTOFOLu+JaRwQLHL/xdcHJTOod7tqHYfpoC5JHrEwKzbhTOwxZBQBfTQjQktKENQtBxXHTe71rUEWfEZQGg60/BC4BrRmh4qJjlJu3v4VIhC7SSHn1"
    ];
  };
  sb = {
    isNormalUser = true;
    extraGroups = ["wheel" "plugdev" "dialout" "libvirtd"];
    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBF/YybP+fQ0J+bNqM5Vgx5vDmVqVWsgUdF1moUxghv7d73GZAFaM6IFBdrXTAa33AwnWwDPMrTgP1V6SXBkb3ciJo/lD1urJGbydbSI5Ksq9d59wvOeANvyWYrQw6+eqTQ=="
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBDf6+TFaUtITiiU7b6DOiT4/C8fzCq70j9DGnNyo/+5bS7ffRezTS0AqqltHQs9/lbjUbtP+Iil7RUGF0o0X6v5y/Gt/GdV9QR+Nv1mJCF1KVOeMKm/vB0jjN+ncwHU+BA=="
+      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCyPk5WyFoWSvF4ozehxcVBoZ+UHgrI7VW/OoQfFFwIQe0qvetUZBMZwR2FwkLPAMZV8zz1v4EfncudEkVghy4P+/YVLlDjqDq9zwZnh8Nd/ifu84wmcNWHT2UcqnhjniCdshL8a44memzABnxfLLv+sXhP2x32cJAamo5y6fukr2qLp2jbXzR+3sv3klE0ruUXis/BR1lLqNJEYP8jB6fLn2sLKinnZPfn6DwVOk10mGeQsdME/eGl3phpjhODH9JW5V2V5nJBbC0rBnq+78dyArKVqjPSmIcSy72DEIpTctnMEN1W34BGrnsDd5Xd/DKxKxHKTMCHtZRwLC2X0NWN"
+      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCMALVC8RDTHec+PC8y1s3tcpUAODgq6DEzQdHDf/cyvDMfmCaPiMxfIdmkns5lMa03hymIfSmLUF0jFFDc7biRp7uf9AAXNsrTmplHii0l0McuOOZGlSdZM4eL817P7UwJqFMxJyFXDjkubhQiX6kp25Kfuj/zLnupRCaiDvE7ho/xay6Jrv0XLz935TPDwkc7W1asLIvsZLheB+sRz9SMOb9gtrvk5WXZl5JTOFOLu+JaRwQLHL/xdcHJTOod7tqHYfpoC5JHrEwKzbhTOwxZBQBfTQjQktKENQtBxXHTe71rUEWfEZQGg60/BC4BrRmh4qJjlJu3v4VIhC7SSHn1"
    ];
  };
  rj = {
@ -33,11 +33,40 @@
      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBPsv4UMEFV0UHeHdA9R3sC+qoMxrqhcuFqwqWMI4AF/lixwcbRyA8QKiu/7R22m2u6pp+Zk6hYqcxdgClI4uN2oQhVjJX6wEgfT94vC/67OKJI/NNVsR8G0lr0ufCo4Lbw=="
    ];
  };
+  pca006132 = {
+    isNormalUser = true;
+    extraGroups = ["plugdev" "dialout" "wireshark"];
+    openssh.authorizedKeys.keys = [
+      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBE/sPOOiw3843+rrcYV2pOVkffNc1xsOgnuCUmy1Fa2VF8x9kqmgQv61sxsuKRkKKoinvqrASxLkWVd6nkiiDuEISibEXs8r1BwuT05cS7RkEhCakSMZ6y/iqOtjt2bx+A=="
+      "ssh-rsa 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"
+    ];
+    shell = pkgs.zsh;
+  };
  occheung = {
+    isNormalUser = true;
+    extraGroups = ["plugdev" "dialout" "wireshark"];
+    openssh.authorizedKeys.keys = [
+      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBPEvmWmxpFpMgp5fpjKud8ev0cyf/+X5fEpQt/YD/+u4mbvZYPE300DLqQ0h/qjgvaGMz1ndf4idYnRdy+plJEC/+hmlRW5NlcpAr3S/LYAisacgKToFVl+MlBo+emS9Ig=="
+    ];
+  };
+  ak = {
+    isNormalUser = true;
+    openssh.authorizedKeys.keys = [
+      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBLTzNGqfswE9QF28fuSzpTFAKs4gXQA1LcRsB9WVoYxcLMoqqEAmzEqqzIAQFocMLZHB4A0YnSK9wKDdRWYjKRAfqKfWb/2b5w1OLaYz+Idho8KAOYxDfhXusYPq7Z9/rA=="
+    ];
+  };
+  ychenfo = {
    isNormalUser = true;
    extraGroups = ["plugdev" "dialout"];
    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBPEvmWmxpFpMgp5fpjKud8ev0cyf/+X5fEpQt/YD/+u4mbvZYPE300DLqQ0h/qjgvaGMz1ndf4idYnRdy+plJEC/+hmlRW5NlcpAr3S/LYAisacgKToFVl+MlBo+emS9Ig=="
+      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBJDEHOerlYRjkTaaa9HLLjTRuLAkPdhcRiizUkmANKgKdO17xZ7Or05dAGeeivv+TEmJShSK0EljhGv/+pTHrf/L0d7pExSjyb0m08iYb8gLCoQVx7hcFLIGiYnNoLab9g=="
+    ];
+  };
+  geekzjk = {
+    isNormalUser = true;
+    extraGroups = ["plugdev" "dialout"];
+    openssh.authorizedKeys.keys = [
+      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBJkGRYVmOXvPSne2xUYbC8XyotTQ4pr6dwR7IiRgOSHqwm6ECHRtjMM2hneI+lBv91YCg/l5WXE111dNXw6vniBIEqjrErz3MmjEZ5aFJI6l9KiyJ4zueRubuUyBVevaEw=="
    ];
  };
  spaqin = {
@ -48,67 +77,32 @@
    ];
    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 = ["libvirtd"];
+    openssh.authorizedKeys.keys = [
+      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBGKbLMWCWrcUIVDKc7wrkn1Oo1PCH3K0HWIXnPjgASqKdzrNkgrHcg8UsXS0tLKtoYWbWisVUU+V05p6RKMOP7TP6hc2xoVRov6fBMuKHnVJbR9BAkn3O2EaJ7Rlo0y8aQ=="
+    ];
+  };
+  ciciwu = {
    isNormalUser = true;
    extraGroups = ["plugdev" "dialout"];
    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBK1tUg7TtceARRnGI80Ai5kNFolFfZ++LH9v1UoRCiJdxeQWPdNYO0Gj7+ejJvgZXwvN4yHGgcZHraEml4Mj/dKrEMFygfuYLDRmXtPFwX6TNMrWlxMhPzuNY+yCaxlqYg=="
+      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBIzRznRnbyIfo64IVlZNS6ZisPNYKoIeadkXz0dhvp4RBzOKbIOj/9wVbtmMvbScuDJw79dSk0cviaTU8hfMfSplzm3iZGqX4N4JWPtPQAu28e3P6Cu89AiKKjT3dUM50Q=="
+    ];
+  };
+  stevefan1999 = {
+    isNormalUser = true;
+    extraGroups = ["plugdev" "dialout" "wireshark"];
+    openssh.authorizedKeys.keys = [
+      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBCxQXT1Qd9ysrCAgJl+81UpiL7/32CzYXvZeByG7MatJ1o2DOBZmm5r4GEwz2F9bRc/KIc9UyurX0jWS6O5FhAYLg4ekCrm5bvLEgl8py4Cd+VZY8wM3nQGyDTFQzeg4lQ=="
+    ];
+  };
+  topquark12 = {
+    isNormalUser = true;
+    extraGroups = ["plugdev" "dialout" "wireshark" "libvirtd"];
+    openssh.authorizedKeys.keys = [
+      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBGtaB32Ri1O7zRVG+1ADXmhwbK0r8R+c5W1RJd7cab5O9jp10wI+0JArFgK8u4m9oaR1rrVy4ym8wWMNu8vGKVTgyK+6UK87qTD96pnzwTyvzKCMOIHVBAPsnVfdOSKXLQ=="
    ];
  };

@ -119,4 +113,11 @@
      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBGChLocYJi8XcSJkIjT2Olm3jPGjtRq5aORa5G9F3OqmjCfvav9Q5+2Mc64XqHtNTffnJuDe4gv+lVJatC0URvPs2HyxXmxRK0jgkkLSUsV2SYLlgMqHW3jsrdh6wKBmkg=="
    ];
  };
+  tom = {
+    isNormalUser = true;
+    extraGroups = ["plugdev" "dialout"];
+    openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDCK1oOnVC5VJYQhmo8AvuKeApoEIbosJaEj81uBVt11"
+    ];
+  };
 }
--- 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
@ -2,7 +2,13 @@

 { 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 (pkgs.fetchFromGitHub {
+    owner = "nixos";
+    repo = "nixpkgs";
+    rev = "2ec0c698eaf3e7a4d13988538f08d65b3d006f40";
+    sha256 = "137py5fhmjs3p1dgqmd7cxsxzzs67nrqqijxmflb0ck1fnfzrij7";
+  }) {};
 in
 {
  deployment.targetHost = host;
@ -10,35 +16,19 @@ in
  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;
-
  imports =
    [
      (./. + "/${host}-hardware-configuration.nix")
-      ./avscan-module.nix
    ];
  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)'
+      patchPhase = oa.patchPhase or "" + ''
+          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 ];
@ -51,32 +41,25 @@ in
  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
+    wget vim gitAndTools.gitFull sshfs firefox chromium thunderbird hexchat
    usbutils pciutils uhubctl 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
+    xpra
+    rust-analyzer
+    (vscode-with-extensions.override {
+      vscodeExtensions = [
+        vscode-extensions.matklad.rust-analyzer
+      ];
+    })
+    pkgs-unstable.joplin-desktop
    virt-manager spice-gtk
-    kicad
    any-nix-shell
  ];
  programs.wireshark.enable = true;
@ -90,11 +73,9 @@ in
    setuid = true;
  };

-  services.avscan.enable = true;
-
  services.openssh.enable = true;
-  services.openssh.authorizedKeysInHomedir = false;
-  services.openssh.settings.PasswordAuthentication = false;
+  services.openssh.forwardX11 = true;
+  services.openssh.passwordAuthentication = false;
  services.openssh.extraConfig =
    ''
    StreamLocalBindUnlink yes
@ -107,6 +88,7 @@ in
    PKCS11Provider "${pkgs.opensc}/lib/opensc-pkcs11.so"
    '';
  programs.ssh.startAgent = true;
+  services.gnome.gnome-keyring.enable = pkgs.lib.mkForce false;
  programs.ssh.agentPKCS11Whitelist = "${pkgs.opensc}/lib/opensc-pkcs11.so";
  security.pam.p11.enable = true;

@ -126,21 +108,31 @@ 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";

  services.xserver.displayManager.gdm.enable = true;
  services.xserver.desktopManager.gnome.enable = true;
-  environment.gnome.excludePackages = [ pkgs.epiphany ];
+  environment.gnome.excludePackages = [ pkgs.epiphany pkgs.gnome3.geary ];

  systemd.suppressedSystemUnits = [
      "hibernate.target"
@ -156,7 +148,6 @@ in

  hardware.bluetooth.enable = true;

-  programs.zsh.enable = true;
  programs.fish.enable = true;
  programs.fish.promptInit = ''
    any-nix-shell fish --info-right | source
@ -166,14 +157,15 @@ in
  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.packages = [ m-labs.openocd ];
  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.binaryCachePublicKeys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
+  nix.binaryCaches = ["https://nixbld.m-labs.hk" "https://cache.nixos.org"];
+  nix.sandboxPaths = ["/opt"];

+  nix.package = pkgs.nix_2_4;
  nix.extraOptions = ''
-    experimental-features = nix-command flakes impure-derivations
+    experimental-features = nix-command flakes
  '';
 }
--- a/nixops/device-tree-module.nix
+++ b/nixops/device-tree-module.nix
@ -0,0 +1,67 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.hardware.deviceTree;
+in {
+  options = {
+      hardware.deviceTree = {
+        enable = mkOption {
+          default = pkgs.stdenv.hostPlatform.platform.kernelDTB or false;
+          type = types.bool;
+          description = ''
+            Build device tree files. These are used to describe the
+            non-discoverable hardware of a system.
+          '';
+        };
+
+        base = mkOption {
+          default = "${config.boot.kernelPackages.kernel}/dtbs";
+          defaultText = "\${config.boot.kernelPackages.kernel}/dtbs";
+          example = literalExample "pkgs.device-tree_rpi";
+          type = types.path;
+          description = ''
+            The path containing the base device-tree (.dtb) to boot. Contains
+            device trees bundled with the Linux kernel by default.
+          '';
+        };
+
+        name = mkOption {
+          default = null;
+          example = "some-dtb.dtb";
+          type = types.nullOr types.str;
+          description = ''
+            The name of an explicit dtb to be loaded, relative to the dtb base.
+            Useful in extlinux scenarios if the bootloader doesn't pick the
+            right .dtb file from FDTDIR.
+          '';
+        };
+
+        overlays = mkOption {
+          default = [];
+          example = literalExample
+            "[\"\${pkgs.device-tree_rpi.overlays}/w1-gpio.dtbo\"]";
+          type = types.listOf types.path;
+          description = ''
+            A path containing device tree overlays (.dtbo) to be applied to all
+            base device-trees.
+          '';
+        };
+
+        package = mkOption {
+          default = null;
+          type = types.nullOr types.path;
+          internal = true;
+          description = ''
+            A path containing the result of applying `overlays` to `base`.
+          '';
+        };
+      };
+  };
+
+  config = mkIf (cfg.enable) {
+    hardware.deviceTree.package = if (cfg.overlays != [])
+      then pkgs.deviceTree.applyOverlays cfg.base cfg.overlays else cfg.base;
+  };
+}
--- a/nixops/device-tree-pkg.nix
+++ b/nixops/device-tree-pkg.nix
@ -0,0 +1,17 @@
+{ lib, stdenvNoCC, dtc, findutils }:
+
+with lib; {
+  applyOverlays = (base: overlays: stdenvNoCC.mkDerivation {
+    name = "device-tree-overlays";
+    nativeBuildInputs = [ dtc findutils ];
+    buildCommand = let
+      quotedDtbos = concatMapStringsSep " " (o: "\"${toString o}\"") (toList overlays);
+    in ''
+      for dtb in $(find ${base} -name "*.dtb" ); do
+        outDtb=$out/$(realpath --relative-to "${base}" "$dtb")
+        mkdir -p "$(dirname "$outDtb")"
+        fdtoverlay -o "$outDtb" -i "$dtb" ${quotedDtbos};
+      done
+    '';
+  });
+}
--- a/nixops/experimental-users.nix
+++ b/nixops/experimental-users.nix
@ -0,0 +1,10 @@
+{ pkgs, ... }:
+
+{
+  creotech = {
+    isNormalUser = true;
+    openssh.authorizedKeys.keys = [
+      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCz2zz2tzQS+jzORA+D/KiVFCXNBV9xwQRAblnyUaUODje62t3/22b/60btrl2GvtPh2MAoZ7GBjbR85WZFUJ2MvLVSyTWfVnB5bjsi2o4se+TN0xCtoZJCWQG9H6wYfXMrc9gY98in6zxxTI4qUENGV/1qQpURgpFd9aUVmA8biz53DA7In2oongImhCz6gDf+eZw2iaBjrtYqzPanMWvIKlCfTcfc71RqdHSpChcGUEmtq1fXmyoyqgAHd0xEoMq7sJR89IdQ+rGND5vXCbqvS8MhYpwNjlYRCMJWgMhcf4tK5diOHH9pIj+aIgfTq60E3K+uAz+bIqiTVB5N46kx"
+    ];
+  };
+}
--- a/nixops/extra-udev.nix
+++ b/nixops/extra-udev.nix
@ -1,4 +1,11 @@
 ''
+# 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"
+# STM32 devkit
+SUBSYSTEM=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="374e", 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
@ -18,10 +25,6 @@ SUBSYSTEM=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="df11", MODE="0660"
 # 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
+# Shenzhen logic analyzer
 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/franz-hardware-configuration.nix
+++ b/nixops/franz-hardware-configuration.nix
@ -10,10 +10,10 @@

  boot.initrd.availableKernelModules = [ "xhci_pci" "thunderbolt" "ahci" "nvme" "usbhid" "usb_storage" "sd_mod" "rtsx_pci_sdmmc" ];
  boot.initrd.kernelModules = [ ];
+  boot.kernelPackages = pkgs.linuxPackages_5_15;
  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";
@ -23,7 +23,6 @@
  fileSystems."/boot" =
    { device = "/dev/disk/by-uuid/A33B-F001";
      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
    };

  swapDevices = [ ];
@ -33,7 +32,5 @@
  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
@ -18,18 +18,25 @@
  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;
+  virtualisation.libvirtd.allowedBridges = [ "virbr0" "br0" ];
+  networking.bridges = {
+    br0 = {
+      interfaces = [ "eno1" ];
+    };
+  };
+  networking.networkmanager.enable = false;
+  networking.useDHCP = false;
+  networking.interfaces.br0.useDHCP = true;

  system.stateVersion = "19.03";
 }
--- a/nixops/hestia-hardware-configuration.nix
+++ b/nixops/hestia-hardware-configuration.nix
@ -18,18 +18,15 @@
  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
@ -0,0 +1,32 @@
+{ config, lib, pkgs, ... }:
+
+{
+  imports =
+    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
+    ];
+
+  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/62a38d9c-452c-4648-be12-6131e95b8276";
+      fsType = "ext4";
+    };
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/88F6-46F2";
+      fsType = "vfat";
+    };
+
+  swapDevices = [ ];
+
+  nix.maxJobs = lib.mkDefault 8;
+  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
+
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  system.stateVersion = "19.03";
+}
--- 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 +1,141 @@
+{ host }:
+
+{ config, pkgs, ... }:
+let
+  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";
+
+  imports =
+    [
+      (./. + "/${host}-hardware-configuration.nix")
+    ];
+  nixpkgs.config.packageOverrides = super: let self = super.pkgs; in {
+    pam_p11 = super.pam_p11.overrideAttrs(oa: {
+      patchPhase = oa.patchPhase or "" + ''
+          substituteInPlace src/match_openssh.c --replace \
+            '"%s/.ssh/authorized_keys", pw->pw_dir)' \
+            '"/etc/ssh/authorized_keys.d/%s", pw->pw_name)'
+        '';
+    });
+  };
+
+  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
+    evince
+    (python3.withPackages(ps: with ps; [ numpy scipy ]))
+    psmisc
+    telnet unzip zip gnupg
+    sublime3 rink
+    tmux screen tigervnc
+    any-nix-shell
+  ];
+  programs.wireshark.enable = true;
+
+  services.openssh.enable = true;
+  services.openssh.forwardX11 = true;
+  services.openssh.passwordAuthentication = false;
+  services.openssh.extraConfig =
+    ''
+    StreamLocalBindUnlink yes
+    '';
+  programs.mosh.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";
+
+  services.xserver.displayManager.lightdm.enable = true;
+  services.xserver.desktopManager.xfce.enable = true;
+
+  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"
+  ];
+
+  programs.fish.enable = true;
+  programs.fish.promptInit = ''
+    any-nix-shell fish --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 = [ m-labs.openocd ];
+  services.udev.extraRules = (import ./extra-udev.nix);
+
+  nix.binaryCachePublicKeys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
+  nix.binaryCaches = ["https://nixbld.m-labs.hk" "https://cache.nixos.org"];
+  nix.sandboxPaths = ["/opt"];
+
+  nix.package = pkgs.nix_2_4;
+  nix.extraOptions = ''
+    experimental-features = nix-command flakes
+  '';
+}
--- a/nixops/nixops.nix
+++ b/nixops/nixops.nix
@ -6,17 +6,16 @@
  network.enableRollback = true;

  rpi-1 = import ./rpi.nix { host = "rpi-1"; rpi4 = true; };
+  rpi-2 = import ./rpi.nix { host = "rpi-2"; rpi4 = false; experimental-users = true; };
+  rpi-3 = import ./rpi.nix { host = "rpi-3"; rpi4 = true; };
  rpi-4 = import ./rpi.nix { host = "rpi-4"; rpi4 = true; };
+  rpi-ext = import ./rpi-server.nix { host = "rpi-ext"; 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"; };
-  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
@ -8,27 +8,34 @@
    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
    ];

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

  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/69b15848-1cfc-4e3e-91de-1df0d2fc7a80";
+    { device = "/dev/disk/by-uuid/e8aa18dc-70de-440c-885f-652a123acb15";
      fsType = "ext4";
    };

  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/D0A3-DDAE";
+    { device = "/dev/disk/by-uuid/19DD-B26F";
      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
    };

+  swapDevices =
+    [ { device = "/dev/disk/by-uuid/86b091d2-9e61-4938-bcd9-6417e69a98b3"; }
+    ];
+
+  nix.maxJobs = lib.mkDefault 12;
  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";
+  hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.legacy_470;
+  services.xserver.videoDrivers = [ "nvidia" ];
+  services.xserver.displayManager.gdm.wayland = false;
+
+  system.stateVersion = "19.03";
 }
--- 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-server.nix
+++ b/nixops/rpi-server.nix
@ -0,0 +1,153 @@
+{ host, rpi4 }:
+
+{ config, pkgs, ... }:
+{
+  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.loader.raspberryPi = pkgs.lib.mkIf rpi4 {
+    enable = true;
+    version = 4;
+  };
+  boot.kernelParams = ["cma=64M"]; # work around https://github.com/raspberrypi/linux/issues/3208
+  boot.kernelPackages = if rpi4 then pkgs.linuxPackages_rpi4 else pkgs.linuxPackages_rpi3;
+  boot.initrd.includeDefaultModules = false;
+
+  # work around https://github.com/NixOS/nixpkgs/issues/125354
+  disabledModules = [ "hardware/device-tree.nix" ];
+  imports = [ ./device-tree-module.nix ];
+  nixpkgs.config.packageOverrides = super: let self = super.pkgs; in {
+    deviceTree = super.callPackage ./device-tree-pkg.nix {};
+  };
+  hardware.deviceTree.enable = true;
+  hardware.deviceTree.base = pkgs.device-tree_rpi;
+  hardware.deviceTree.overlays = [ "${pkgs.device-tree_rpi.overlays}/rpi-poe.dtbo" ];
+
+
+  fileSystems = {
+    "/" = {
+      device = "/dev/disk/by-label/NIXOS_SD";
+      fsType = "ext4";
+    };
+  };
+
+  services.openssh.enable = true;
+  services.openssh.passwordAuthentication = false;
+  services.openssh.extraConfig =
+    ''
+    StreamLocalBindUnlink yes
+    '';
+  programs.mosh.enable = true;
+
+  networking.hostName = host;
+  time.timeZone = "Asia/Hong_Kong";
+
+  hardware.enableRedistributableFirmware = true;
+  services.hostapd = {
+    enable        = true;
+    interface     = "wlan0";
+    hwMode        = "g";
+    ssid          = "M-Labs-ext";
+    wpaPassphrase = (import /etc/nixos/secret/wifi_ext_password.nix);
+    extraConfig   = ''
+      ieee80211d=1
+      country_code=HK
+      ieee80211n=1
+      wmm_enabled=1
+      auth_algs=1
+      wpa_key_mgmt=WPA-PSK
+      rsn_pairwise=CCMP
+    '';
+  };
+  networking.interfaces.eth0 = {
+    ipv4.addresses = [{
+      address = "192.168.1.30";
+      prefixLength = 24;
+    }];
+    ipv6.addresses = [{
+      address = "2001:470:f821:1:dea6:32ff:fe95:2fcf";
+      prefixLength = 64;
+    }];
+    ipv4.routes = [{
+      address = "0.0.0.0";
+      prefixLength = 0;
+      via = "192.168.1.1";
+    }];
+    ipv6.routes = [{
+      address = "::";
+      prefixLength = 0;
+      via = "fe80::523e:aaff:fe0c:e49d";
+    }];
+  };
+  networking.interfaces.wlan0 = {
+    ipv4.addresses = [{
+      address = "192.168.13.1";
+      prefixLength = 24;
+    }];
+    ipv6.addresses = [{
+      address = "2001:470:f821:3::";
+      prefixLength = 64;
+    }];
+  };
+  services.dnsmasq = {
+    enable = true;
+    servers = ["192.168.1.1#53"];
+    extraConfig = ''
+      interface=wlan0
+      bind-interfaces
+      dhcp-range=192.168.13.10,192.168.13.254,24h
+      enable-ra
+      dhcp-range=::,constructor:wlan0,ra-only
+      no-resolv
+    '';
+  };
+  boot.kernel.sysctl."net.ipv4.ip_forward" = 1;
+  boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = "1";
+  boot.kernel.sysctl."net.ipv6.conf.default.forwarding" = "1";
+
+  users.extraGroups.plugdev = { };
+  users.mutableUsers = false;
+  users.defaultUserShell = pkgs.fish;
+  users.extraUsers = import ./common-users.nix { inherit pkgs; };
+  security.sudo.wheelNeedsPassword = false;
+  services.udev.extraRules = (import ./extra-udev.nix);
+
+  documentation.enable = false;
+  environment.systemPackages = with pkgs; [
+    psmisc wget vim git sshfs usbutils lm_sensors file telnet mosh tmux
+    imagemagick
+  ];
+  programs.fish.enable = true;
+
+  services.avahi.enable = true;
+  services.avahi.publish.enable = true;
+  services.avahi.publish.userServices = true;
+  services.printing.enable = true;
+  services.printing.drivers = [ pkgs.hplip ];
+  services.printing.browsing = true;
+  services.printing.listenAddresses = [ "192.168.1.30:631" "192.168.13.1:631" ];
+  services.printing.defaultShared = true;
+  hardware.sane.enable = true;
+  hardware.sane.extraBackends = [ pkgs.hplip ];
+  systemd.sockets.cups.wants = [ "network-setup.service" ];
+  systemd.sockets.cups.after = [ "network-setup.service" ];
+  systemd.sockets.cups.wantedBy = [ "multi-user.target" ];
+  systemd.services.cups.wantedBy = [ "multi-user.target" ];
+
+  networking.firewall.allowedTCPPorts = [ 631 ];
+  networking.firewall.interfaces.wlan0.allowedUDPPorts = [ 53 67 ];
+
+  nix.binaryCachePublicKeys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
+  nix.binaryCaches = ["https://cache.nixos.org" "https://nixbld.m-labs.hk"];
+  nix.trustedUsers = ["root" "nix"];
+
+  nix.package = pkgs.nix_2_4;
+  nix.extraOptions = ''
+    experimental-features = nix-command flakes
+  '';
+}
--- a/nixops/rpi.nix
+++ b/nixops/rpi.nix
@ -2,7 +2,7 @@

 { 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;
@ -14,8 +14,20 @@ in
  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.kernelPackages = if rpi4 then pkgs.linuxPackages_rpi4 else pkgs.linuxPackages_rpi3;
  boot.initrd.includeDefaultModules = false;

+  # work around https://github.com/NixOS/nixpkgs/issues/125354
+  disabledModules = [ "hardware/device-tree.nix" ];
+  imports = [ ./device-tree-module.nix ];
+  nixpkgs.config.packageOverrides = super: let self = super.pkgs; in {
+    deviceTree = super.callPackage ./device-tree-pkg.nix {};
+  };
+  hardware.deviceTree.enable = true;
+  hardware.deviceTree.base = pkgs.device-tree_rpi;
+  hardware.deviceTree.overlays = [ "${pkgs.device-tree_rpi.overlays}/rpi-poe.dtbo" ];
+
+
  fileSystems = {
    "/" = {
      device = "/dev/disk/by-label/NIXOS_SD";
@ -24,9 +36,8 @@ in
  };

  services.openssh.enable = true;
-  services.openssh.authorizedKeysInHomedir = false;
-  services.openssh.settings.PasswordAuthentication = false;
-  services.openssh.settings.GatewayPorts = "clientspecified";
+  services.openssh.passwordAuthentication = false;
+  services.openssh.gatewayPorts = "clientspecified";
  services.openssh.extraConfig =
    ''
    StreamLocalBindUnlink yes
@ -35,12 +46,18 @@ in

  networking.hostName = host;

+  networking.firewall.allowedTCPPorts = if host == "rpi-2" then [ 6000 ] else [];
+
  time.timeZone = "Asia/Hong_Kong";

  users.extraGroups.plugdev = { };
  users.mutableUsers = false;
  users.defaultUserShell = pkgs.fish;
-  users.extraUsers = (import ./common-users.nix { inherit pkgs; }) // {
+  users.extraUsers = (import ./common-users.nix { inherit pkgs; }) //
+    (pkgs.lib.optionalAttrs experimental-users (import ./experimental-users.nix { inherit pkgs; })) // {
+    nix = {
+      isNormalUser = true;
+    };
    nixbld = {
      isNormalUser = true;
      extraGroups = ["plugdev" "dialout"];
@ -50,25 +67,22 @@ in
    };
  };
  security.sudo.wheelNeedsPassword = false;
-  services.udev.packages = [ artiq.packages.aarch64-linux.openocd-bscanspi ];
+  services.udev.packages = [ m-labs.openocd ];
  services.udev.extraRules = (import ./extra-udev.nix);

  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 sshfs usbutils uhubctl 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.binaryCachePublicKeys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
+  nix.binaryCaches = ["https://cache.nixos.org" "https://nixbld.m-labs.hk"];
+  nix.trustedUsers = ["root" "nix" "sb"];

+  nix.package = pkgs.nix_2_4;
  nix.extraOptions = ''
-    experimental-features = nix-command flakes impure-derivations
+    experimental-features = nix-command flakes
  '';
 }
--- 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
@ -18,18 +18,15 @@
  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