split into it-infra

2020-06-20 17:53:53 +08:00 · 2020-06-20 17:53:53 +08:00 · 90cc2c5049
parent 77722ae68b
commit 90cc2c5049
40 changed files with 0 additions and 2978 deletions
--- a/nixbld-etc-nixos/backup-module.nix
+++ b/nixbld-etc-nixos/backup-module.nix
@ -1,54 +0,0 @@
-{ config, pkgs, lib, ... }:
-with lib;
-let
-  makeBackup = pkgs.writeScript "make-backup" ''
-    #!${pkgs.bash}/bin/bash
-
-    set -e
-    umask 0077
-
-    DBDUMPDIR=`mktemp -d`
-    pushd $DBDUMPDIR
-
-    ${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.gnutar}/bin/tar cf - --exclude "/var/lib/gitea/repositories/*/*.git/archives" /etc/nixos /var/lib/gitea flarum.sql mattermost.sql | \
-        ${pkgs.bzip2}/bin/bzip2 | \
-        ${pkgs.gnupg}/bin/gpg --symmetric --batch --passphrase-file /etc/nixos/secret/backup-passphrase | \
-        ${pkgs.rclone}/bin/rclone rcat --config /etc/nixos/secret/rclone.conf dropbox:backup-`date +%F`.tar.bz2.gpg
-
-    popd
-    rm -rf $DBDUMPDIR
-
-    echo Backup done
-  '';
-  cfg = config.services.mlabs-backup;
-in
-{
-  options.services.mlabs-backup = {
-    enable = mkOption {
-      type = types.bool;
-      default = false;
-      description = "Enable backups";
-    };
-  };
-
-  config = mkIf cfg.enable {
-    systemd.services.mlabs-backup = {
-      description = "M-Labs backup";
-      serviceConfig = {
-        Type = "oneshot";
-        User = "root";
-        Group = "root";
-        ExecStart = "${makeBackup}";
-      };
-    };
-
-    systemd.timers.mlabs-backup = {
-      description = "M-Labs backup";
-      wantedBy = [ "timers.target" ];
-      timerConfig.OnCalendar = "weekly";
-    };
-  };
-}
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
@ -1,667 +0,0 @@
-# Edit this configuration file to define what should be installed on
-# your system.  Help is available in the configuration.nix(5) man page
-# and in the NixOS manual (accessible by running ‘nixos-help’).
-
-{ config, pkgs, ... }:
-
-let
-  netifWan = "enp0s31f6";
-  netifLan = "enp3s0";
-  netifWifi = "wlp1s0";
-  netifSit = "henet0";
-  hydraWwwOutputs = "/var/www/hydra-outputs";
-in
-{
-  imports =
-    [
-      ./hardware-configuration.nix
-      ./homu/nixos-module.nix
-      ./backup-module.nix
-      (builtins.fetchTarball {
-        url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/v2.3.0/nixos-mailserver-v2.3.0.tar.gz";
-        sha256 = "0lpz08qviccvpfws2nm83n7m2r8add2wvfg9bljx9yxx8107r919";
-      })
-    ];
-
-  # Use the systemd-boot EFI boot loader.
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-  boot.blacklistedKernelModules = ["iwlwifi"];
-
-  security.apparmor.enable = true;
-
-  networking = {
-    hostName = "nixbld";
-    firewall = {
-      allowedTCPPorts = [ 80 443 ];
-      allowedUDPPorts = [ 53 67 ];
-      trustedInterfaces = [ netifLan ];
-    };
-    interfaces."${netifLan}" = {
-      ipv4.addresses = [{
-        address = "192.168.1.1";
-        prefixLength = 24;
-      }];
-      ipv6.addresses = [{
-        address = "2001:470:f821:1::";
-        prefixLength = 64;
-      }];
-    };
-    interfaces."${netifWifi}" = {
-      ipv4.addresses = [{
-        address = "192.168.12.1";
-        prefixLength = 24;
-      }];
-      ipv6.addresses = [{
-        address = "2001:470:f821:2::";
-        prefixLength = 64;
-      }];
-    };
-    nat = {
-      enable = true;
-      externalInterface = netifWan;
-      internalInterfaces = [ netifLan netifWifi ];
-      forwardPorts = [
-        { sourcePort = 2201; destination = "192.168.1.201:22"; proto = "tcp"; }
-        { sourcePort = 2202; destination = "192.168.1.202:22"; proto = "tcp"; }
-        { sourcePort = 2203; destination = "192.168.1.203:22"; proto = "tcp"; }
-        { sourcePort = 2204; destination = "192.168.1.204:22"; proto = "tcp"; }
-        { sourcePort = 2205; destination = "192.168.1.205:22"; proto = "tcp"; }
-      ];
-      extraCommands = ''
-        iptables -w -N block-lan-from-wifi
-        iptables -w -A block-lan-from-wifi -i ${netifLan} -o ${netifWifi} -j DROP
-        iptables -w -A block-lan-from-wifi -i ${netifWifi} -o ${netifLan} -j DROP
-        iptables -w -A FORWARD -j block-lan-from-wifi
-      '';
-      extraStopCommands = ''
-        iptables -w -D FORWARD -j block-lan-from-wifi 2>/dev/null|| true
-        iptables -w -F block-lan-from-wifi 2>/dev/null|| true
-        iptables -w -X block-lan-from-wifi 2>/dev/null|| true
-      '';
-    };
-    sits."${netifSit}" = {
-      dev = netifWan;
-      remote = "216.218.221.6";
-      local = "42.200.147.171";
-      ttl = 255;
-    };
-    interfaces."${netifSit}".ipv6 = {
-      addresses = [{ address = "2001:470:18:629::2"; prefixLength = 64; }];
-      routes = [{ address = "::"; prefixLength = 0; }];
-    };
-  };
-  boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = "1";
-  boot.kernel.sysctl."net.ipv6.conf.default.forwarding" = "1";
-
-  services.unbound = {
-    enable = true;
-    extraConfig =
-    ''
-    server:
-      port: 5353
-    '';
-  };
-
-  services.hostapd = {
-    enable        = true;
-    interface     = netifWifi;
-    hwMode        = "g";
-    ssid          = "M-Labs";
-    wpaPassphrase = (import /etc/nixos/secret/wifi_password.nix);
-    extraConfig   = ''
-      ieee80211d=1
-      country_code=HK
-      ieee80211n=1
-      wmm_enabled=1
-      auth_algs=1
-      wpa_key_mgmt=WPA-PSK
-      rsn_pairwise=CCMP
-    '';
-  };
-  services.dnsmasq = {
-    enable = true;
-    servers = ["::1#5353"];
-    extraConfig = ''
-      interface=${netifLan}
-      interface=${netifWifi}
-      bind-interfaces
-      dhcp-range=interface:${netifLan},192.168.1.81,192.168.1.254,24h
-      dhcp-range=interface:${netifWifi},192.168.12.10,192.168.12.254,24h
-      enable-ra
-      dhcp-range=interface:${netifLan},::,constructor:${netifLan},ra-names
-      dhcp-range=interface:${netifWifi},::,constructor:${netifWifi},ra-only
-
-      no-resolv
-
-      # Static IPv4s to make Red Pitayas less annoying
-      dhcp-host=rp-f05cc9,192.168.1.190
-      dhcp-host=rp-f0612e,192.168.1.191
-      # Static IPv4s to make port redirections work
-      dhcp-host=rpi-1,192.168.1.201
-      dhcp-host=rpi-2,192.168.1.202
-      dhcp-host=rpi-3,192.168.1.203
-      dhcp-host=rpi-4,192.168.1.204
-      dhcp-host=rpi-5,192.168.1.205
-
-      # Default IP addresses for ARTIQ boards
-      address=/thermostat/192.168.1.26
-      address=/kc705/192.168.1.50
-      address=/zc706/192.168.1.51
-      address=/zc706-2/192.168.1.52
-      address=/sayma/192.168.1.60
-      address=/metlino/192.168.1.65
-      address=/kasli/192.168.1.70
-      address=/kasli-customer/192.168.1.75
-      address=/stabilizer-customer/192.168.1.76
-      # uTCA MCH from NAT
-      address=/tschernobyl/192.168.1.80
-    '';
-  };
-
-  # Select internationalisation properties.
-  i18n.defaultLocale = "en_US.UTF-8";
-  console = {
-    font = "Lat2-Terminus16";
-    keyMap = "de";
-  };
-
-  # Set your time zone.
-  time.timeZone = "Asia/Hong_Kong";
-
-  # List packages installed in system profile. To search, run:
-  # $ nix search wget
-  environment.systemPackages = with pkgs; [
-    wget vim git file lm_sensors acpi pciutils psmisc telnet nixops
-    irssi tmux usbutils imagemagick jq zip unzip
-  ];
-
-  # Some programs need SUID wrappers, can be configured further or are
-  # started in user sessions.
-  # programs.mtr.enable = true;
-  # programs.gnupg.agent = { enable = true; enableSSHSupport = true; };
-
-  # List services that you want to enable:
-
-  services.apcupsd.enable = true;
-  services.apcupsd.configText = ''
-    UPSTYPE usb
-    NISIP 127.0.0.1
-    BATTERYLEVEL 10
-    MINUTES 5
-  '';
-
-  # Enable the OpenSSH daemon.
-  services.openssh.enable = true;
-  services.openssh.forwardX11 = true;
-  services.openssh.passwordAuthentication = false;
-  programs.mosh.enable = true;
-
-  programs.fish.enable = true;
-
-  # Enable CUPS to print documents.
-  services.avahi.enable = true;
-  services.avahi.interfaces = [ netifLan ];
-  services.avahi.publish.enable = true;
-  services.avahi.publish.userServices = true;
-  nixpkgs.config.allowUnfree = true;
-  services.printing.enable = true;
-  services.printing.drivers = [ pkgs.hplipWithPlugin ];
-  services.printing.browsing = true;
-  services.printing.listenAddresses = [ "*:631" ];
-  services.printing.defaultShared = true;
-  hardware.sane.enable = true;
-  hardware.sane.extraBackends = [ pkgs.hplipWithPlugin ];
-
-  users.extraGroups.plugdev = { };
-  users.extraUsers.sb = {
-    isNormalUser = true;
-    extraGroups = ["wheel" "plugdev" "dialout" "lp" "scanner"];
-    shell = pkgs.fish;
-    openssh.authorizedKeys.keys = [
-      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCyPk5WyFoWSvF4ozehxcVBoZ+UHgrI7VW/OoQfFFwIQe0qvetUZBMZwR2FwkLPAMZV8zz1v4EfncudEkVghy4P+/YVLlDjqDq9zwZnh8Nd/ifu84wmcNWHT2UcqnhjniCdshL8a44memzABnxfLLv+sXhP2x32cJAamo5y6fukr2qLp2jbXzR+3sv3klE0ruUXis/BR1lLqNJEYP8jB6fLn2sLKinnZPfn6DwVOk10mGeQsdME/eGl3phpjhODH9JW5V2V5nJBbC0rBnq+78dyArKVqjPSmIcSy72DEIpTctnMEN1W34BGrnsDd5Xd/DKxKxHKTMCHtZRwLC2X0NWN"
-      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCMALVC8RDTHec+PC8y1s3tcpUAODgq6DEzQdHDf/cyvDMfmCaPiMxfIdmkns5lMa03hymIfSmLUF0jFFDc7biRp7uf9AAXNsrTmplHii0l0McuOOZGlSdZM4eL817P7UwJqFMxJyFXDjkubhQiX6kp25Kfuj/zLnupRCaiDvE7ho/xay6Jrv0XLz935TPDwkc7W1asLIvsZLheB+sRz9SMOb9gtrvk5WXZl5JTOFOLu+JaRwQLHL/xdcHJTOod7tqHYfpoC5JHrEwKzbhTOwxZBQBfTQjQktKENQtBxXHTe71rUEWfEZQGg60/BC4BrRmh4qJjlJu3v4VIhC7SSHn1"
-    ];
-  };
-  users.extraUsers.rj = {
-    isNormalUser = true;
-    extraGroups = ["wheel" "plugdev" "dialout"];
-  };
-  users.extraUsers.astro = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout"];
-    shell = pkgs.bashInteractive;
-  };
-  users.extraUsers.nix = {
-    isNormalUser = true;
-  };
-  security.sudo.wheelNeedsPassword = false;
-  security.hideProcessInformation = true;
-  boot.kernel.sysctl."kernel.dmesg_restrict" = true;
-  services.udev.packages = [ pkgs.sane-backends ];
-
-  nix.distributedBuilds = true;
-  nix.buildMachines = [
-    {
-       hostName = "localhost";
-       maxJobs = 4;
-       system = "x86_64-linux";
-       supportedFeatures = ["big-parallel"];
-    }
-    {
-       hostName = "rpi-3";
-       sshUser = "nix";
-       sshKey = "/etc/nixos/secret/nix_id_rsa";
-       maxJobs = 1;
-       system = "aarch64-linux";
-    }
-  ];
-  services.hydra = {
-    enable = true;
-    package = pkgs.hydra-unstable;
-    useSubstitutes = true;
-    hydraURL = "https://nixbld.m-labs.hk";
-    notificationSender = "hydra@m-labs.hk";
-    minimumDiskFree = 15;  # in GB
-    minimumDiskFreeEvaluator = 1;
-    extraConfig =
-      ''
-      binary_cache_secret_key_file = /etc/nixos/secret/nixbld.m-labs.hk-1
-      max_output_size = 10000000000
-
-      <runcommand>
-        job = web:web:web
-        command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/web
-      </runcommand>
-
-      <runcommand>
-        job = artiq:full:sipyco-manual-html
-        command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/sipyco-manual-html
-      </runcommand>
-      <runcommand>
-        job = artiq:full:sipyco-manual-latexpdf
-        command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/sipyco-manual-latexpdf
-      </runcommand>
-
-      <runcommand>
-        job = artiq:full-beta:artiq-manual-html
-        command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/artiq-manual-html-beta
-      </runcommand>
-      <runcommand>
-        job = artiq:full-beta:artiq-manual-latexpdf
-        command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/artiq-manual-latexpdf-beta
-      </runcommand>
-      <runcommand>
-        job = artiq:full-beta:conda-channel
-        command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/artiq-conda-channel-beta
-      </runcommand>
-
-      <runcommand>
-        job = artiq:full:artiq-manual-html
-        command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/artiq-manual-html
-      </runcommand>
-      <runcommand>
-        job = artiq:full:artiq-manual-latexpdf
-        command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/artiq-manual-latexpdf
-      </runcommand>
-      <runcommand>
-        job = artiq:full:conda-channel
-        command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/artiq-conda-channel
-      </runcommand>
-      '';
-  };
-  systemd.services.hydra-www-outputs-init = {
-    description = "Set up a hydra-owned directory for build outputs";
-    wantedBy = [ "multi-user.target" ];
-    requiredBy = [ "hydra-queue-runner.service" ];
-    before = [ "hydra-queue-runner.service" ];
-    serviceConfig = {
-      Type = "oneshot";
-      ExecStart = [ "${pkgs.coreutils}/bin/mkdir -p ${hydraWwwOutputs}" "${pkgs.coreutils}/bin/chown hydra-queue-runner:hydra ${hydraWwwOutputs}" ];
-    };
-  };
-
-
-  nix.extraOptions = ''
-    secret-key-files = /etc/nixos/secret/nixbld.m-labs.hk-1
-  '';
-  nix.sandboxPaths = ["/opt"];
-
-  services.munin-node.enable = true;
-  services.munin-cron = {
-    enable = true;
-     hosts = ''
-       [${config.networking.hostName}]
-       address localhost
-     '';
-  };
-  services.mlabs-backup.enable = true;
-
-  services.gitea = {
-    enable = true;
-    httpPort = 3001;
-    rootUrl = "https://git.m-labs.hk/";
-    appName = "M-Labs Git";
-    cookieSecure = true;
-    disableRegistration = true;
-    mailerPasswordFile = "/etc/nixos/secret/mailerpassword";
-    extraConfig =
-    ''
-    [mailer]
-    ENABLED = true
-    HOST = ssl.serverraum.org:587
-    FROM = sysop@m-labs.hk
-    USER = sysop@m-labs.hk
-
-    [service]
-    ENABLE_NOTIFY_MAIL = true
-
-    [attachment]
-    ALLOWED_TYPES = */*
-    '';
-  };
-  systemd.tmpfiles.rules = [
-    "L+ '${config.services.gitea.stateDir}/custom/templates/home.tmpl' - - - - ${./gitea-home.tmpl}"
-  ];
-
-  services.mattermost = {
-    enable = true;
-    siteUrl = "https://chat.m-labs.hk/";
-    mutableConfig = true;
-  };
-
-  services.matterbridge = {
-    enable = true;
-    configPath = "/etc/nixos/secret/matterbridge.toml";
-  };
- 
-  nixpkgs.config.packageOverrides = super: let self = super.pkgs; in {
-    hydra-unstable = super.hydra-unstable.overrideAttrs(oa: {
-      patches = oa.patches or [] ++ [ ./hydra-conda.patch ./hydra-retry.patch ./hydra-unbreak-sysbuild.patch ];
-      hydraPath = oa.hydraPath + ":" + super.lib.makeBinPath [ super.jq ];
-    });
-    matterbridge = super.matterbridge.overrideAttrs(oa: {
-      patches = oa.patches or [] ++ [ ./matterbridge-disable-github.patch ];
-    });
-  };
-
-  security.acme.acceptTerms = true;
-  security.acme.email = "sb" + "@m-labs.hk";
-  security.acme.certs = {
-    "nixbld.m-labs.hk" = {
-      group = "nginx";
-      user = "nginx";
-      webroot = "/var/lib/acme/acme-challenge";
-      extraDomains = {
-        "m-labs.hk" = null;
-        "www.m-labs.hk" = null;
-        "conda.m-labs.hk" = null;
-        "lab.m-labs.hk" = null;
-        "git.m-labs.hk" = null;
-        "chat.m-labs.hk" = null;
-        "hooks.m-labs.hk" = null;
-        "forum.m-labs.hk" = null;
-        "perso.m-labs.hk" = null;
-        "nmigen.org" = null;
-        "www.nmigen.org" = null;
-
-        "openhardware.hk" = null;
-        "git.openhardware.hk" = null;
-      };
-    };
-  };
-  services.nginx = {
-    enable = true;
-    recommendedProxySettings = true;
-    recommendedGzipSettings = true;
-    virtualHosts = let
-      mainWebsite = {
-        addSSL = true;
-        useACMEHost = "nixbld.m-labs.hk";
-        root = "${hydraWwwOutputs}/web";
-        extraConfig = ''
-          error_page 404 /404.html;
-        '';
-        locations."^~ /fonts/".extraConfig = ''
-          expires 60d;
-        '';
-        locations."^~ /js/".extraConfig = ''
-          expires 60d;
-        '';
-        locations."/MathJax/" = {
-          alias = "/var/www/MathJax/";
-          extraConfig = ''
-            expires 60d;
-          '';
-        };
-
-        # legacy URLs, redirect to avoid breaking people's bookmarks
-        locations."/gateware.html".extraConfig = ''
-          return 301 /gateware/migen/;
-        '';
-        locations."/migen".extraConfig = ''
-          return 301 /gateware/migen/;
-        '';
-        locations."/artiq".extraConfig = ''
-          return 301 /experiment-control/artiq/;
-        '';
-        locations."/artiq/resources.html".extraConfig = ''
-          return 301 /experiment-control/resources/;
-        '';
-
-        # autogenerated manuals
-        locations."/artiq/sipyco-manual/" = {
-          alias = "${hydraWwwOutputs}/sipyco-manual-html/share/doc/sipyco-manual/html/";
-        };
-        locations."=/artiq/sipyco-manual.pdf" = {
-          alias = "${hydraWwwOutputs}/sipyco-manual-latexpdf/share/doc/sipyco-manual/SiPyCo.pdf";
-        };
-        locations."/artiq/manual-beta/" = {
-          alias = "${hydraWwwOutputs}/artiq-manual-html-beta/share/doc/artiq-manual/html/";
-        };
-        locations."=/artiq/manual-beta.pdf" = {
-          alias = "${hydraWwwOutputs}/artiq-manual-latexpdf-beta/share/doc/artiq-manual/ARTIQ.pdf";
-        };
-        locations."/artiq/manual/" = {
-          alias = "${hydraWwwOutputs}/artiq-manual-html/share/doc/artiq-manual/html/";
-        };
-        locations."=/artiq/manual.pdf" = {
-          alias = "${hydraWwwOutputs}/artiq-manual-latexpdf/share/doc/artiq-manual/ARTIQ.pdf";
-        };
-
-        # legacy content
-        locations."/migen/manual/" = {
-          alias = "/var/www/m-labs.hk.old/migen/manual/";
-        };
-        locations."/artiq/manual-release-4/" = {
-          alias = "/var/www/m-labs.hk.old/artiq/manual-release-4/";
-        };
-        locations."/artiq/manual-release-3/" = {
-          alias = "/var/www/m-labs.hk.old/artiq/manual-release-3/";
-        };
-        locations."/artiq/manual-release-2/" = {
-          alias = "/var/www/m-labs.hk.old/artiq/manual-release-2/";
-        };
-      };
-    in {
-      "m-labs.hk" = mainWebsite;
-      "www.m-labs.hk" = mainWebsite;
-      "lab.m-labs.hk" = {
-        addSSL = true;
-        useACMEHost = "nixbld.m-labs.hk";
-        locations."/munin/".alias = "/var/www/munin/";
-        locations."/munin".extraConfig = ''
-          auth_basic "Munin";
-          auth_basic_user_file /etc/nixos/secret/muninpasswd;
-        '';
-        locations."/homu/".proxyPass = "http://127.0.0.1:54856/";
-      };
-      "nixbld.m-labs.hk" = {
-        forceSSL = true;
-        useACMEHost = "nixbld.m-labs.hk";
-        locations."/".proxyPass = "http://127.0.0.1:3000";
-      };
-      "conda.m-labs.hk" = {
-        forceSSL = true;
-        useACMEHost = "nixbld.m-labs.hk";
-        locations."/artiq-beta/" = {
-          alias = "${hydraWwwOutputs}/artiq-conda-channel-beta/";
-          extraConfig = ''
-            autoindex on;
-            index bogus_index_file;
-          '';
-        };
-        locations."/artiq/" = {
-          alias = "${hydraWwwOutputs}/artiq-conda-channel/";
-          extraConfig = ''
-            autoindex on;
-            index bogus_index_file;
-          '';
-        };
-      };
-      "git.m-labs.hk" = {
-        forceSSL = true;
-        useACMEHost = "nixbld.m-labs.hk";
-        locations."/".proxyPass = "http://127.0.0.1:3001";
-        extraConfig = ''
-          client_max_body_size 300M;
-        '';
-      };
-      "chat.m-labs.hk" = {
-        forceSSL = true;
-        useACMEHost = "nixbld.m-labs.hk";
-        locations."/".proxyPass = "http://127.0.0.1:8065";
-        locations."~ /api/v[0-9]+/(users/)?websocket$".proxyPass = "http://127.0.0.1:8065";
-        locations."~ /api/v[0-9]+/(users/)?websocket$".proxyWebsockets = true;
-      };
-      "hooks.m-labs.hk" = {
-        forceSSL = true;
-        useACMEHost = "nixbld.m-labs.hk";
-        locations."/mattermost-github".extraConfig = ''
-          include ${pkgs.nginx}/conf/uwsgi_params;
-          uwsgi_pass unix:${config.services.uwsgi.runDir}/uwsgi-mgi.sock;
-        '';
-        locations."/rfq".extraConfig = ''
-          include ${pkgs.nginx}/conf/uwsgi_params;
-          uwsgi_pass unix:${config.services.uwsgi.runDir}/uwsgi-rfq.sock;
-        '';
-      };
-      "forum.m-labs.hk" = {
-        forceSSL = true;
-        useACMEHost = "nixbld.m-labs.hk";
-        root = "/var/www/flarum/public";
-        locations."~ \.php$".extraConfig = ''
-          fastcgi_pass unix:${config.services.phpfpm.pools.flarum.socket};
-          fastcgi_index index.php;
-        '';
-        extraConfig = ''
-          index index.php;
-          include /var/www/flarum/.nginx.conf;
-        '';
-      };
-      "perso.m-labs.hk" = {
-        addSSL = true;
-        useACMEHost = "nixbld.m-labs.hk";
-        root = "/var/www/perso";
-      };
-      "nmigen.org" = {
-        addSSL = true;
-        useACMEHost = "nixbld.m-labs.hk";
-        locations."/".extraConfig = ''
-          return 307 https://m-labs.hk/gateware/nmigen/;
-        '';
-      };
-      "www.nmigen.org" = {
-        addSSL = true;
-        useACMEHost = "nixbld.m-labs.hk";
-        locations."/".extraConfig = ''
-          return 307 https://m-labs.hk/gateware/nmigen/;
-        '';
-      };
-
-      "git.openhardware.hk" = {
-        forceSSL = true;
-        useACMEHost = "nixbld.m-labs.hk";
-        locations."/".proxyPass = "http://127.0.0.1:3002";
-        extraConfig = ''
-          client_max_body_size 300M;
-        '';
-      };
-    };
-  };
-  services.uwsgi = {
-    enable = true;
-    plugins = [ "python3" ];
-    instance = {
-      type = "emperor";
-      vassals = {
-        mattermostgithub = import ./mattermost-github-integration/uwsgi-config.nix { inherit config pkgs; };
-        rfq = import ./rfq/uwsgi-config.nix { inherit config pkgs; };
-      };
-    };
-  };
-  services.mysql = {
-    enable = true;
-    package = pkgs.mariadb;
-  };
-  services.phpfpm.pools.flarum = {
-    user = "nobody";
-    settings = {
-      "listen.owner" = "nginx";
-      "listen.group" = "nginx";
-      "listen.mode" = "0600";
-      "pm" = "dynamic";
-      "pm.max_children" = 5;
-      "pm.start_servers" = 2;
-      "pm.min_spare_servers" = 1;
-      "pm.max_spare_servers" = 3;
-      "pm.max_requests" = 500;
-    };
-  };
-
-  services.homu = {
-    enable = true;
-    config = "/etc/nixos/secret/homu.toml";
-  };
-
-  mailserver = {
-    enable = true;
-    localDnsResolver = false;  # conflicts with dnsmasq
-    # Some mail servers do reverse DNS lookups to filter spam.
-    # Getting a proper reverse DNS record from ISP is difficult, so use whatever already exists.
-    fqdn = "42-200-147-171.static.imsbiz.com";
-    domains = [ "nmigen.org" ];
-    loginAccounts = (import /etc/nixos/secret/email_accounts.nix);
-    certificateScheme = 3;
-  };
-  security.acme.certs."${config.mailserver.fqdn}".extraDomains = {
-    "mail.nmigen.org" = null;
-  };
-
-  containers.openhardwarehk = {
-    autoStart = true;
-    config =
-      { config, pkgs, ... }:
-      {
-        services.gitea = {
-          enable = true;
-          httpPort = 3002;
-          rootUrl = "https://git.openhardware.hk/";
-          appName = "Open Hardware HK";
-          cookieSecure = true;
-          disableRegistration = true;
-          extraConfig =
-          ''
-          [attachment]
-          ALLOWED_TYPES = */*
-          '';
-        };
-      };
-  };
-
-  # This value determines the NixOS release with which your system is to be
-  # compatible, in order to avoid breaking some software such as database
-  # servers. You should change this only after NixOS release notes say you
-  # should.
-  system.stateVersion = "18.09"; # Did you read the comment?
-}
--- a/nixbld-etc-nixos/gitea-home.tmpl
+++ b/nixbld-etc-nixos/gitea-home.tmpl
@ -1,23 +0,0 @@
-{{template "base/head" .}}
-<div class="home">
-	<div class="ui stackable middle very relaxed page grid">
-		<div class="sixteen wide center aligned centered column">
-			<div>
-				<img class="logo" src="{{AppSubUrl}}/img/gitea-lg.png" />
-			</div>
-			<div class="hero">
-				<h1 class="ui icon header title">
-					{{AppName}}
-				</h1>
-			</div>
-		</div>
-	</div>
-	<div class="ui stackable middle very relaxed page grid">
-		<div class="sixteen wide center column">
-			<p class="large">
-				Welcome! This Gitea instance is here to support projects related to <a href="https://m-labs.hk">M-Labs</a>. You may want to browse the <a href="https://git.m-labs.hk/M-Labs/">M-Labs organization</a> where many projects are located. If you would like an account (we give them to anyone who wants to contribute on projects related to Sinara, ARTIQ, nMigen, etc.), simply write a short email to sb@m-***.hk stating the username you would like to have.
-			</p>
-		</div>
-	</div>
-</div>
-{{template "base/footer" .}}
--- a/nixbld-etc-nixos/homu/disable-ssh-host-keycheck.patch
+++ b/nixbld-etc-nixos/homu/disable-ssh-host-keycheck.patch
@ -1,13 +0,0 @@
-diff --git a/homu/git_helper.py b/homu/git_helper.py
-index 0f70c69..f53fb57 100755
--- a/homu/git_helper.py
-+++ b/homu/git_helper.py
-@@ -7,7 +7,7 @@ SSH_KEY_FILE = os.path.join(os.path.dirname(__file__), '../cache/key')
- 
- 
- def main():
-    args = ['ssh', '-i', SSH_KEY_FILE, '-S', 'none'] + sys.argv[1:]
-+    args = ['ssh', '-o', 'StrictHostKeyChecking=no', '-i', SSH_KEY_FILE, '-S', 'none'] + sys.argv[1:]
-     os.execvp('ssh', args)
- 
- 
--- a/nixbld-etc-nixos/homu/nixos-module.nix
+++ b/nixbld-etc-nixos/homu/nixos-module.nix
@ -1,52 +0,0 @@
-{ config, pkgs, lib, ... }:
-with lib;
-let
-  homu = pkgs.callPackage ./pkg.nix {};
-  cfg = config.services.homu;
-in
-
-{
-  options.services.homu = {
-    enable = mkOption {
-      type = types.bool;
-      default = false;
-      description = "Enable the bot";
-    };
-    dbDir = mkOption {
-      type = types.str;
-      default = "/var/db/homu";
-      description = "Path to the database file (use the same path in config.toml)";
-    };
-    config = mkOption {
-      description = "Location of config.toml";
-      type = types.str;
-    };
-  };
-
-  config = mkIf cfg.enable {
-    users.users.homu = {
-      group = "homu";
-      home = cfg.dbDir;
-      createHome = true;
-    };
-    users.groups.homu = {};
-
-    systemd.services.homu = {
-      description = "Homu bot";
-      wantedBy = [ "multi-user.target" ];
-      after    = [ "network.target" ];
-      serviceConfig = {
-        Type = "simple";
-        ExecStart = "${homu}/bin/homu -c ${cfg.config}";
-
-        Restart = "always";
-        RestartSec = "5sec";
-
-        User = "homu";
-        Group = "homu";
-      };
-    };
-  };
-
-}
-  
--- a/nixbld-etc-nixos/homu/patch-cache-directory.patch
+++ b/nixbld-etc-nixos/homu/patch-cache-directory.patch
@ -1,26 +0,0 @@
-diff --git a/homu/git_helper.py b/homu/git_helper.py
-index 0f70c69..732230c 100755
--- a/homu/git_helper.py
-+++ b/homu/git_helper.py
-@@ -3,7 +3,7 @@
- import sys
- import os
- 
-SSH_KEY_FILE = os.path.join(os.path.dirname(__file__), '../cache/key')
-+SSH_KEY_FILE = os.path.expanduser("~/cache/key")
- 
- 
- def main():
-diff --git a/homu/main.py b/homu/main.py
-index 16b60a2..a2e109a 100644
--- a/homu/main.py
-+++ b/homu/main.py
-@@ -649,7 +649,7 @@ def git_push(git_cmd, branch, state):
- 
- 
- def init_local_git_cmds(repo_cfg, git_cfg):
-    fpath = 'cache/{}/{}'.format(repo_cfg['owner'], repo_cfg['name'])
-+    fpath = '{}/cache/{}/{}'.format(os.path.expanduser("~"), repo_cfg['owner'], repo_cfg['name'])
-     url = 'git@github.com:{}/{}.git'.format(repo_cfg['owner'], repo_cfg['name'])  # noqa
- 
-     if not os.path.exists(SSH_KEY_FILE):
--- a/nixbld-etc-nixos/homu/pkg.nix
+++ b/nixbld-etc-nixos/homu/pkg.nix
@ -1,34 +0,0 @@
-{ python3Packages, python3, fetchFromGitHub, git, openssh }:
-
-let
-  uritemplate_0_2_0 = python3Packages.github3_py.overrideAttrs(oa: rec {
-  	version = "0.2.0";
-  	src = python3Packages.fetchPypi {
-      pname = "uritemplate.py";
-      inherit version;
-      sha256 = "1pfk04pmnysz0383lwzgig8zqlwiv2n4pmq51f0mc60zz1jimq4g";
-    };
-  });
-  github3_py_0_9_6 = python3Packages.github3_py.overrideAttrs(oa: rec {
-    version = "0.9.6";
-    src = python3Packages.fetchPypi {
-      pname = "github3.py";
-      inherit version;
-      sha256 = "1i8xnh586z4kka7pjl7cy08fmzjs14c8jdp8ykb9jjpzsy2xncdq";
-    };
-    propagatedBuildInputs = [ python3Packages.requests uritemplate_0_2_0 ];
-  });
-in
-  python3Packages.buildPythonApplication {
-    name = "homu";
-    src = fetchFromGitHub {
-      owner = "servo";
-      repo = "homu";
-      rev = "2ea53e76ebac3e5fa11bc39054b3cd4c42eff607";
-      sha256 = "1ih7s8zfbpq0qb9vqbxzr0r4s9ff52l4ipr916kwbck3ygliq3r9";
-    };
-    patches = [ ./patch-cache-directory.patch ./disable-ssh-host-keycheck.patch ];
-    postInstall = "chmod 755 $out/${python3.sitePackages}/homu/git_helper.py";
-    propagatedBuildInputs = [ github3_py_0_9_6 git openssh ] ++ (with python3Packages; [ toml jinja2 requests bottle waitress retrying ]);
-    checkPhase = "python -m unittest discover tests -v";
-  }
--- a/nixbld-etc-nixos/hydra-conda.patch
+++ b/nixbld-etc-nixos/hydra-conda.patch
@ -1,47 +0,0 @@
-commit 5aa5f8d5742883d41d7278a2c8bc2c9a2ddfef45
-Author: Sebastien Bourdeauducq <sb@m-labs.hk>
-Date:   Sun Apr 14 18:25:27 2019 +0800
-
-    add SVG icon for conda package
-
-diff --git a/src/root/product-list.tt b/src/root/product-list.tt
-index 298d0a66..85914bbd 100644
--- a/src/root/product-list.tt
-+++ b/src/root/product-list.tt
-@@ -157,6 +157,11 @@
-             <img src="[% c.uri_for("/static/images/debian.png") %]" alt="DEB" />
-           </td>
-           <td>Debian package</td>
-+        [% CASE "conda" %]
-+          <td>
-+            <img src="[% c.uri_for("/static/images/conda.svg") %]" width="32" height="32" alt="Conda" />
-+          </td>
-+          <td>Conda package</td>
-         [% CASE "iso" %]
-           <td>
-             <img src="[% c.uri_for("/static/images/iso.png") %]" alt="ISO" />
-diff --git a/src/root/static/images/conda.svg b/src/root/static/images/conda.svg
-new file mode 100644
-index 00000000..67859731
--- /dev/null
-+++ b/src/root/static/images/conda.svg
-@@ -0,0 +1,18 @@
-+<svg width="128" height="128" style="enable-background:new 0 0 128 128;" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
-+  <g id="g2">
-+    <g>
-+      <path d="M118.89,75.13c-1.31-2.72-3.46-5.53-6.97-7.33c-2.37-1.48-4.57-2.24-6.01-2.63 c1.53-5.6-0.64-10.06-3.69-13.39c-4.53-4.88-9.27-5.59-9.27-5.59l-0.01,0c1.56-3.03,2.15-6.54,1.36-9.99 c-1-4.26-3.29-6.94-6.31-8.73c-3.09-1.83-6.91-2.73-10.83-3.43c-1.88-0.34-9.81-1.45-13.1-6c-2.65-3.69-2.73-10.33-3.45-12.32 c-0.77-2.05-3.38-1.15-6.23,0.76c-3.33,2.22-10.23,9.35-12.89,16.49c-2.03,5.47-2.08,10.21-1.28,13.89 c-3.29,0.55-5.76,1.66-6.23,1.88c-0.16,0.05-0.32,0.1-0.49,0.17c-3.01,1.24-9.43,7.02-10.01,15.85c-0.2,3.14,0.21,6.31,1.2,9.26 c-3.94,1.1-6.22,2.54-6.26,2.57c-2,0.75-5.18,2.95-6.15,4.13c-1.97,2.38-3.34,5.21-4.15,8.18C6.35,85.36,7,92.71,10.14,98.67 c1.74,3.31,4.12,6.83,6.74,9.52c8.55,8.79,23.31,12.11,34.96,14.03c14.19,2.34,29.05,1.52,42.33-3.97 c19.92-8.22,25.22-21.44,26-25.17C121.92,84.77,119.8,77,118.89,75.13z" style="fill:#865D53;"/>
-+      <g>
-+        <g>
-+          <ellipse cx="85.95" cy="66.39" rx="16.61" ry="15.5" style="fill:#FFFFFF;" transform="matrix(0.1106 -0.9939 0.9939 0.1106 10.453 144.4706)"/>
-+          <path d="M92.63,66.36c-0.23,3.3-3.14,5.82-6.49,5.62c-3.36-0.19-5.9-3.04-5.67-6.34 c0.22-3.31,3.12-5.82,6.48-5.62C90.31,60.21,92.86,63.06,92.63,66.36" style="fill:#2F2F2F;"/>
-+        </g>
-+        <g>
-+          <ellipse cx="42.46" cy="66.4" rx="15.5" ry="16.61" style="fill:#FFFFFF;" transform="matrix(0.9972 -0.0752 0.0752 0.9972 -4.8714 3.3796)"/>
-+          <path d="M49.02,65.13c0.38,3.29-2.01,6.3-5.34,6.72c-3.34,0.43-6.36-1.9-6.74-5.18 c-0.4-3.29,1.99-6.3,5.33-6.73C45.6,59.52,48.63,61.85,49.02,65.13" style="fill:#2F2F2F;"/>
-+        </g>
-+      </g>
-+      <path d="M87.35,89.46c-2.22-1.5-5.02-0.51-7.49,0c-6.9,1.42-12.95,1.48-15.86,1.48 c-2.91,0-8.96-0.06-15.86-1.48c-2.47-0.51-5.27-1.5-7.49,0c-2.82,1.9-0.74,8.74,3.7,13.36c2.68,2.79,9.07,8.21,19.66,8.21 c10.58,0,16.97-5.42,19.66-8.21C88.09,98.2,90.17,91.37,87.35,89.46z" style="fill:#ED6D31;"/>
-+    </g>
-+  </g>
-+</svg>
-\ No newline at end of file
--- a/nixbld-etc-nixos/hydra-retry.patch
+++ b/nixbld-etc-nixos/hydra-retry.patch
@ -1,19 +0,0 @@
-commit 86bf81c0b8a51bffa4b4b566e1caaac6f0e041d3
-Author: Sebastien Bourdeauducq <sb@m-labs.hk>
-Date:   Thu Mar 14 17:45:32 2019 +0800
-
-    add option to disable retries on transient failures
-
-diff --git a/src/hydra-queue-runner/build-remote.cc b/src/hydra-queue-runner/build-remote.cc
-index 69c430eb..bdbc808d 100644
--- a/src/hydra-queue-runner/build-remote.cc
-+++ b/src/hydra-queue-runner/build-remote.cc
-@@ -344,7 +344,7 @@ void State::buildRemote(ref<Store> destStore,
-                     break;
-                 case BuildResult::TransientFailure:
-                     result.stepStatus = bsFailed;
-                    result.canRetry = true;
-+                    result.canRetry = get(step->drv->env, "__hydraRetry").value_or("1") == "1";
-                     result.errorMsg = "";
-                     break;
-                 case BuildResult::TimedOut:
--- a/nixbld-etc-nixos/hydra-unbreak-sysbuild.patch
+++ b/nixbld-etc-nixos/hydra-unbreak-sysbuild.patch
@ -1,25 +0,0 @@
-diff --git a/src/lib/Hydra/Schema/Builds.pm b/src/lib/Hydra/Schema/Builds.pm
-index d4334300..014d07ce 100644
--- a/src/lib/Hydra/Schema/Builds.pm
-+++ b/src/lib/Hydra/Schema/Builds.pm
-@@ -608,6 +608,7 @@ makeQueries('', "");
- makeQueries('ForProject', "and project = ?");
- makeQueries('ForJobset', "and jobset_id = ?");
- makeQueries('ForJob', "and jobset_id = ? and job = ?");
-+makeQueries('ForJobName', "and jobset_id = (select id from jobsets j where j.name = ?) and job = ?");
- 
- 
- my %hint = (
-diff --git a/src/script/hydra-eval-jobset b/src/script/hydra-eval-jobset
-index ea336bfc..2f208418 100755
--- a/src/script/hydra-eval-jobset
-+++ b/src/script/hydra-eval-jobset
-@@ -142,7 +142,7 @@ sub fetchInputSystemBuild {
-     $projectName ||= $project->name;
-     $jobsetName ||= $jobset->name;
- 
-    my @latestBuilds = $db->resultset('LatestSucceededForJob')
-+    my @latestBuilds = $db->resultset('LatestSucceededForJobName')
-         ->search({}, {bind => [$jobsetName, $jobName]});
- 
-     my @validBuilds = ();
--- a/nixbld-etc-nixos/matterbridge-disable-github.patch
+++ b/nixbld-etc-nixos/matterbridge-disable-github.patch
@ -1,15 +0,0 @@
-diff --git a/bridge/mattermost/helpers.go b/bridge/mattermost/helpers.go
-index 14b7469d..d9b77bdf 100644
--- a/bridge/mattermost/helpers.go
-+++ b/bridge/mattermost/helpers.go
-@@ -206,6 +206,10 @@ func (b *Bmattermost) skipMessage(message *matterclient.Message) bool {
- 		return true
- 	}
- 
-+	if message.Username == "github" {
-+		return true
-+	}
-+
- 	// if the message has reactions don't repost it (for now, until we can correlate reaction with message)
- 	if message.Post.HasReactions {
- 		return true
--- a/nixbld-etc-nixos/mattermost-github-integration/pkg.nix
+++ b/nixbld-etc-nixos/mattermost-github-integration/pkg.nix
@ -1,32 +0,0 @@
-{ fetchFromGitHub, python3Packages }:
-with python3Packages;
-
-buildPythonPackage rec {
-  pname = "mattermost-github-integration";
-  version = "0.0.0-unstable";
-  src = fetchFromGitHub {
-    owner = "softdevteam";
-    repo = "mattermost-github-integration";
-    rev = "1124a0ff233b50ed6070cb84cfffd128ad219831";
-    sha256 = "1hfvjaxjhliy8sv9j3616fkdwd2jqhfsj9ai7ggx88zhxknrfx85";
-  };
-  propagatedBuildInputs = [
-    appdirs
-    click
-    flask
-    itsdangerous
-    jinja2
-    markupsafe
-    olefile
-    packaging
-    pillow
-    pyparsing
-    requests
-    six
-    werkzeug
-  ];
-  checkInputs = [
-    pytest
-  ];
-  doCheck = true;
-}
--- a/nixbld-etc-nixos/mattermost-github-integration/uwsgi-config.nix
+++ b/nixbld-etc-nixos/mattermost-github-integration/uwsgi-config.nix
@ -1,15 +0,0 @@
-{ config, pkgs }:
-
-let
-  pkg = pkgs.callPackage ./pkg.nix {};
-in {
-  type = "normal";
-  pythonPackages = self: [ pkg ];
-  module = "mattermostgithub:app";
-  env = [
-    "MGI_CONFIG_FILE=${./../secret/mattermost-github-integration.py}"
-  ];
-  socket = "${config.services.uwsgi.runDir}/uwsgi-mgi.sock";
-  # allow access from nginx
-  chmod-socket = 666;
-}
--- a/nixbld-etc-nixos/notifico/nixos-module.nix
+++ b/nixbld-etc-nixos/notifico/nixos-module.nix
@ -1,93 +0,0 @@
-{ config, pkgs, lib, ... }:
-with lib;
-let
-  notifico = (pkgs.callPackage ./pkg.nix {})
-    .overrideAttrs (attrs: {
-      buildInputs = attrs.buildInputs ++ [ pkgs.makeWrapper ];
-      # Extend the module path so that local_config.py can be found
-      postInstall = ''
-        ${attrs.postInstall}
-
-        wrapProgram $out/bin/notifico \
-          --set PYTHONPATH "$${PYTHONPATH}:${cfg.dbDir}"
-      '';
-    });
-  cfg = config.services.notifico;
-in
-
-{
-  options.services.notifico = {
-    enable = mkOption {
-      type = types.bool;
-      default = false;
-      description = "Enable the commit notification service";
-    };
-    enableLocalRedis = mkOption {
-      type = types.bool;
-      default = true;
-      description = "Enable a local Redis server";
-    };
-    dbDir = mkOption {
-      type = types.str;
-      default = "/var/db/notifico";
-      description = "Home directory and location of the database file";
-    };
-    config = mkOption {
-      description = "Path to local_config.py, https://github.com/notifico/notifico/raw/master/notifico/config.py";
-      type = types.str;
-    };
-  };
-
-  config = mkIf cfg.enable {
-    users.users.notifico = {
-      group = "notifico";
-      home = cfg.dbDir;
-      createHome = true;
-    };
-    users.groups.notifico = {};
-
-    services.redis = mkIf cfg.enableLocalRedis {
-      enable = true;
-      bind = "127.0.0.1";
-    };
-
-    systemd.services =
-      let
-        User = "notifico";
-        Group = "notifico";
-        WorkingDirectory = "${cfg.dbDir}";
-        ExecStartPre = [
-          "${pkgs.coreutils}/bin/rm -f local_config.pyc"
-          "${pkgs.coreutils}/bin/ln -sf ${cfg.config} local_config.py"
-        ];
-
-        notifico-init = {
-          description = "Notifico initialization";
-          serviceConfig = {
-            inherit User Group WorkingDirectory ExecStartPre;
-            Type = "oneshot";
-            ExecStart = "${notifico}/bin/notifico init";
-          };
-        };
-        notificoService = component: {
-          description = "Notifico ${component}";
-          wantedBy = [ "multi-user.target" ];
-          after    = [ "network.target" "notifico-init.service" ];
-          requires = [ "notifico-init.service" ];
-          serviceConfig = {
-            inherit User Group WorkingDirectory ExecStartPre;
-            Type = "simple";
-            ExecStart = "${notifico}/bin/notifico ${component}";
-
-            Restart = "always";
-            RestartSec = "5sec";
-          };
-        };
-      in {
-        inherit notifico-init;
-        notifico-www = notificoService "www";
-        notifico-worker = notificoService "worker";
-        notifico-bots = notificoService "bots";
-      };
-  };
-}
--- a/nixbld-etc-nixos/notifico/pkg.nix
+++ b/nixbld-etc-nixos/notifico/pkg.nix
@ -1,107 +0,0 @@
-{ python2Packages, python2, fetchFromGitHub, fetchurl }:
-
-let
-  Flask-Gravatar = python2Packages.buildPythonPackage {
-    name = "Flask-Gravatar";
-    src = python2Packages.fetchPypi {
-      pname = "Flask-Gravatar";
-      version = "0.5.0";
-      sha256 = "1qb2ylirjajdqsmldhwfdhf8i86k7vlh3y4gnqfqj4n6q8qmyrk0";
-    };
-    propagatedBuildInputs = with python2Packages; [
-      pytestrunner
-      flask
-    ];
-    checkInputs = with python2Packages; [
-      check-manifest
-      coverage
-      isort
-      pydocstyle
-      pytestcache
-      pytestcov
-      pytestpep8
-      pytest
-      pygments
-    ];
-  };
-  utopia = python2Packages.buildPythonPackage {
-    name = "utopia";
-    src = fetchFromGitHub {
-      owner = "notifico";
-      repo = "utopia";
-      rev = "70293ed5e1ca55232e0fae71061e7e9b9b29be6f";
-      sha256 = "11cnh9l4d9jlhafnfis9si6kgk9zsdd5439qnhxh6dca3x4a986q";
-    };
-    propagatedBuildInputs = with python2Packages; [
-      gevent
-      blinker
-    ];
-    doCheck = false;
-  };
-  Flask-WTF = python2Packages.flask_wtf.overrideAttrs(oa: rec {
-  	version = "0.8.4";
-  	src = python2Packages.fetchPypi {
-      pname = "Flask-WTF";
-      inherit version;
-      sha256 = "1khbwmlrcnk9f46f7kf531n06pkyfs6nc8fk273js9mj2igngg2y";
-    };
-  });
-  Flask-XML-RPC = python2Packages.flask_wtf.overrideAttrs(oa: rec {
-  	version = "0.1.2";
-  	src = python2Packages.fetchPypi {
-      pname = "Flask-XML-RPC";
-      inherit version;
-      sha256 = "1dwalj7pc5iid9l1k50q5mllirnn9f5s7jq54a66x48a4j179p2a";
-    };
-  });
-in
-  python2Packages.buildPythonApplication {
-    name = "notifico";
-    src = fetchFromGitHub {
-      owner = "notifico";
-      repo = "notifico";
-      rev = "6af849e4c75dff4d740051676f5a2093a44efcee";
-      sha256 = "18jifqdvjy4x5s1bh7vx501pin52g4n3hhw1z4m2c0h512z4spdr";
-    };
-    patches = [
-      (fetchurl {
-        url = https://github.com/whitequark/notifico/commit/22b582fad6cb97af6f7437e8462d720ddacc42ef.patch;
-        sha256 = "0w8i8hf1r8b0p1y1zn9vyvnyi20qp120aiyalqymhsxsh17mma52";
-      })
-    ];
-    propagatedBuildInputs = with python2Packages; [
-      flask
-      Flask-WTF
-      Flask-Gravatar
-      flask_sqlalchemy
-      Flask-XML-RPC
-      flask_mail
-      flask-caching
-      Fabric
-      sqlalchemy
-      utopia
-      gevent
-      oauth2
-      redis
-      gunicorn
-      requests
-      PyGithub
-      xmltodict
-      unidecode
-      raven
-      blinker
-      docopt
-      celery
-    ];
-    postInstall = ''
-      mkdir $out/bin
-      cat << EOF > $out/bin/notifico
-      #!${python2}/bin/python
-      import sys
-      from notifico.__main__ import main
-
-      sys.exit(main(sys.argv))
-      EOF
-      chmod +x $out/bin/notifico
-    '';
-  }
--- a/nixbld-etc-nixos/rfq/pkg.nix
+++ b/nixbld-etc-nixos/rfq/pkg.nix
@ -1,9 +0,0 @@
-{ python3Packages, runCommand }:
-
-# Note: we do not use fetchgit but a local copy instead to avoid
-# chicken-and-egg problem if reinstalling nixbld.m-labs.hk from scratch.
-with python3Packages; buildPythonPackage rec {
-  name = "rfq";
-  src = ./src;
-  propagatedBuildInputs = [ flask flask_mail python-dotenv ];
-}
--- a/nixbld-etc-nixos/rfq/src/requirements.txt
+++ b/nixbld-etc-nixos/rfq/src/requirements.txt
@ -1,10 +0,0 @@
-blinker
-click
-Flask
-Flask-Mail
-itsdangerous
-Jinja2
-MarkupSafe
-python-dotenv
-six
-Werkzeug
--- a/nixbld-etc-nixos/rfq/src/rfq/init.py
+++ b/nixbld-etc-nixos/rfq/src/rfq/init.py
@ -1,75 +0,0 @@
-from os import getenv
-
-from dotenv import load_dotenv
-from flask import Flask
-from flask import current_app
-from flask import json
-from flask import jsonify
-from flask import make_response
-from flask import request
-from flask_mail import Mail
-from flask_mail import Message
-from werkzeug.middleware.proxy_fix import ProxyFix
-
-
-load_dotenv()
-
-app = Flask(__name__)
-app.config.update(
-    DEBUG=getenv("FLASK_DEBUG") == "True",
-    MAIL_SERVER=getenv("FLASK_MAIL_SERVER"),
-    MAIL_PORT=getenv("FLASK_MAIL_PORT"),
-    MAIL_USE_SSL=getenv("FLASK_MAIL_USE_SSL"),
-    MAIL_DEBUG=False,
-    MAIL_USERNAME=getenv("FLASK_MAIL_USERNAME"),
-    MAIL_PASSWORD=getenv("FLASK_MAIL_PASSWORD"),
-    MAIL_RECIPIENT=getenv("FLASK_MAIL_RECIPIENT"),
-    MAIL_SENDER=getenv("FLASK_MAIL_SENDER")
-)
-app.wsgi_app = ProxyFix(app.wsgi_app)
-
-mail = Mail(app)
-
-
-@app.after_request
-def after(response):
-    response.headers["Access-Control-Allow-Origin"] = "*"
-    response.headers["Access-Control-Allow-Headers"] = "*"
-    return response
-
-
-@app.route("/rfq", methods=["POST"])
-def send_rfq():
-    payload = request.json
-    payload = json.loads(json.htmlsafe_dumps(payload))
-
-    if payload is None:
-        resp = jsonify(error="invalid data")
-        return make_response(resp, 400)
-
-    if "email" not in payload:
-        resp = jsonify(error="missing email")
-        return make_response(resp, 400)
-
-    if "note" not in payload:
-        resp = jsonify(error="missing note")
-        return make_response(resp, 400)
-
-    if "configuration" not in payload:
-        resp = jsonify(error="missing configuration")
-        return make_response(resp, 400)
-
-    sender = current_app.config["MAIL_SENDER"]
-    recipient = current_app.config["MAIL_RECIPIENT"]
-
-    msg = Message(
-        "RFQ for Sinara hardware from {}".format(payload["email"]),
-        sender=sender,
-        recipients=[recipient, payload["email"]])
-    msg.body = ("From: {}\nConfiguration: {}\nNote: {}"
-        .format(payload["email"], payload["configuration"], payload["note"]))
-
-    with mail.connect() as conn:
-        conn.send(msg)
-
-    return jsonify("ok")
--- a/nixbld-etc-nixos/rfq/src/setup.py
+++ b/nixbld-etc-nixos/rfq/src/setup.py
@ -1,14 +0,0 @@
-from setuptools import setup
-from setuptools import find_packages
-
-setup(
-    name='rfq',
-    version='1.0.0',
-    packages=find_packages(),
-    zip_safe=False,
-    install_requires=[
-        'Flask',
-        'Flask-Mail',
-        'python-dotenv'
-    ]
-)
--- a/nixbld-etc-nixos/rfq/uwsgi-config.nix
+++ b/nixbld-etc-nixos/rfq/uwsgi-config.nix
@ -1,21 +0,0 @@
-{ config, pkgs }:
-
-let
-  pkg = pkgs.callPackage ./pkg.nix {};
-in {
-  type = "normal";
-  pythonPackages = self: [ pkg ];
-  module = "rfq:app";
-  env = [
-    "FLASK_MAIL_SERVER=ssl.serverraum.org"
-    "FLASK_MAIL_PORT=465"
-    "FLASK_MAIL_USE_SSL=True"
-    "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=sales@m-labs.hk"
-  ];
-  socket = "${config.services.uwsgi.runDir}/uwsgi-rfq.sock";
-  # allow access from nginx
-  chmod-socket = 666;
-}
--- a/nixbld-etc-nixos/secret_permissions.txt
+++ b/nixbld-etc-nixos/secret_permissions.txt
@ -1,11 +0,0 @@
-rw------- 1 root         root           backup-passphrase
-rw------- 1 root         root           email_accounts.nix
-rw------- 1 homu         homu           homu.toml
-rw-rw---- 1 gitea        gitea          mailerpassword
-rw------- 1 matterbridge matterbridge   matterbridge.toml
-rw------- 1 uwsgi        uwsgi          mattermost-github-integration.py
-rw------- 1 nginx        nginx          muninpasswd
-rw-rw---- 1 hydra        hydra          nixbld.m-labs.hk-1
-rw-rw---- 1 hydra        hydra          nix_id_rsa
-rw------- 1 root         root           rclone.conf
-rw------- 1 root         root           wifi_password.nix
--- a/nixops/chiron-hardware-configuration.nix
+++ b/nixops/chiron-hardware-configuration.nix
@ -1,33 +0,0 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, ... }:
-
-{
-  imports =
-    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
-    ];
-
-  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usbhid" "usb_storage" "sd_mod" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/89db7e45-7b7e-44ec-bebc-a02935cc5ba0";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/060C-8772";
-      fsType = "vfat";
-    };
-
-  swapDevices = [ ];
-
-  nix.maxJobs = lib.mkDefault 16;
-  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
-
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-}
--- a/nixops/cnc-hardware-configuration.nix
+++ b/nixops/cnc-hardware-configuration.nix
@ -1,29 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-{
-  imports =
-    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
-    ];
-
-  boot.initrd.availableKernelModules = [ "ata_generic" "uhci_hcd" "ehci_pci" "ahci" "usb_storage" "usbhid" "floppy" "sd_mod" "sr_mod" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/35d9c50c-e479-43a9-8324-b8ded5b71844";
-      fsType = "ext4";
-    };
-
-  swapDevices =
-    [ { device = "/dev/disk/by-uuid/d8480389-c558-4c46-a58f-00207315dbdd"; }
-    ];
-
-  nix.maxJobs = lib.mkDefault 2;
-
-  boot.loader.grub.enable = true;
-  boot.loader.grub.version = 2;
-  boot.loader.grub.device = "/dev/sda";
-
-  services.xserver.videoDrivers = ["intel"];
-}
--- a/nixops/common-users.nix
+++ b/nixops/common-users.nix
@ -1,58 +0,0 @@
-{ pkgs, ... }:
-
-{
-  sb = {
-    isNormalUser = true;
-    extraGroups = ["wheel" "plugdev" "dialout"];
-    openssh.authorizedKeys.keys = [
-      "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 = {
-    isNormalUser = true;
-    extraGroups = ["wheel" "plugdev" "dialout"];
-    openssh.authorizedKeys.keys = [
-      "ssh-rsa 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 rj@lab.m-labs.hk"
-      "ssh-rsa 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 robert-jordens-rsa4096"
-      "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCUdbne3NtIG+iy/jer76/OY+IksuS3BDLSXPnWrGejWnig9h+L6sUV0lEVI6dqp+W/b8jWqPB8nh5S0NZsCd3Ta3Go82k/SPPkh9lB2PpfquhCjLnmC/RNc3TgC4FuiS+NZHqXaTggYHubNwEK+8gynMqkMQXjOGU02U0CtUfsYdAm75AW60DySZCRNwOcU0Ndpn1UCpha7fL1k179Dd/OtArkYsIL24ohlfxFeOB3jGYQK6ATmzbvCRjwIKXcyECuajWwfnDg9FtDWrqHNzu5dJlvmxoWm8zCDgMj53uiA7TjujQN81MYrIJNeEwSr5jXQMqzA3mzlk4k3Z0qs3TP robert-jordens-64FEFBAF-4D0749B2-rsa2048"
-      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMUaB2G1jexxfkdlly3fdWslH54/s/bOuvk9AxqpjtAY robert-jordens-ed25519"
-    ];
-  };
-  harry = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout" "wireshark"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBDcPNCgtdz8erFPRrAwCr4JrkeYXJUUvoRBgP0X2HlzJgDe1Inuo6sC6CGcO3IXbf4MwVA9XEp8BYPHARVeEHhufg/0wnIABLx2GcK99yxOLDUe4h/3YwtqvOcqHEsDx7w=="
-    ];
-  };
-  astro = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout"];
-    openssh.authorizedKeys.keys = [
-      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGJJTSJdpDh82486uPiMhhyhnci4tScp5uUe7156MBC8 a"
-    ];
-    shell = pkgs.bashInteractive;
-  };
-  pca006132 = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBE/sPOOiw3843+rrcYV2pOVkffNc1xsOgnuCUmy1Fa2VF8x9kqmgQv61sxsuKRkKKoinvqrASxLkWVd6nkiiDuEISibEXs8r1BwuT05cS7RkEhCakSMZ6y/iqOtjt2bx+A=="
-    ];
-  };
-  occheung = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBPEvmWmxpFpMgp5fpjKud8ev0cyf/+X5fEpQt/YD/+u4mbvZYPE300DLqQ0h/qjgvaGMz1ndf4idYnRdy+plJEC/+hmlRW5NlcpAr3S/LYAisacgKToFVl+MlBo+emS9Ig=="
-    ];
-  };
-  dsleung = {
-    isNormalUser = true;
-    extraGroups = ["plugdev" "dialout"];
-    openssh.authorizedKeys.keys = [
-      "ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBDbE7HzZKSwGbgRnzwrzCzb3gZKLSritwnEpHS4sa9oXJ5oLFkuFZOpPYDeiMlbUJ9jCk5FRmkLYIkrbz06SUr7P/eUjxu79ENi3RhfVu+ZrrPvgkhKvM/CiXvw3xCOu0w=="
-    ];
-  };
-}
--- a/nixops/desktop.nix
+++ b/nixops/desktop.nix
@ -1,149 +0,0 @@
-{ host }:
-
-{ config, pkgs, ... }:
-let
-  m-labs = import (fetchTarball https://nixbld.m-labs.hk/channel/custom/artiq/full/artiq-full/nixexprs.tar.xz) { inherit pkgs; };
-  pkgs-unstable = import (fetchTarball https://github.com/NixOS/nixpkgs/archive/master.tar.gz) {};
-in
-{
-  deployment.targetHost = host;
-
-  disabledModules = [ "security/pam.nix" ];
-  imports =
-    [
-      (./. + "/${host}-hardware-configuration.nix")
-      ./pam_p11
-    ];
-
-  networking.hostName = host;
-
-  time.timeZone = "Asia/Hong_Kong";
-
-  # List packages installed in system profile. To search, run:
-  # $ nix search wget
-  nixpkgs.config.allowUnfree = true;
-  environment.systemPackages = with pkgs; [
-    opensc yubikey-manager yubikey-manager-qt
-    wget vim gitAndTools.gitFull firefox chromium thunderbird hexchat
-    usbutils pciutils file lm_sensors audacious acpi
-    gimp imagemagick
-    (python3.withPackages(ps: with ps; [ numpy scipy matplotlib qtconsole regex ]))
-    mosh psmisc libreoffice-fresh
-    gtkwave telnet unzip zip gnupg
-    gnome3.gnome-tweaks
-    jq sublime3 rink qemu_kvm
-    tmux xc3sprog m-labs.openocd screen gdb minicom picocom tigervnc
-    emacs bat ripgrep
-    pkgs-unstable.rust-analyzer
-    (pkgs-unstable.vscode-with-extensions.override {
-      vscodeExtensions = [
-        pkgs-unstable.vscode-extensions.matklad.rust-analyzer
-      ];
-    })
-    (import ./fish-nix-shell)
-  ];
-  programs.wireshark.enable = true;
-
-  services.openssh.enable = true;
-  services.openssh.forwardX11 = true;
-  services.openssh.passwordAuthentication = false;
-  hardware.u2f.enable = true;
-  services.pcscd.enable = true;
-  programs.ssh.extraConfig =
-    ''
-    PKCS11Provider "${pkgs.opensc}/lib/opensc-pkcs11.so"
-    '';
-  programs.ssh.startAgent = true;
-  services.gnome3.gnome-keyring.enable = pkgs.lib.mkForce false;
-  programs.ssh.agentPKCS11Whitelist = "${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 pkgs.emacs-all-the-icons-fonts ];
-
-  # Enable the X11 windowing system.
-  services.xserver.enable = true;
-  services.xserver.layout = "us";
-  services.xserver.xkbOptions = "eurosign:e";
-
-  # Enable touchpad support.
-  services.xserver.libinput.enable = true;
-
-  services.xserver.displayManager.gdm.enable = true;
-  services.xserver.displayManager.gdm.autoSuspend = false;
-  powerManagement.enable = false;
-  services.xserver.desktopManager.gnome3.enable = true;
-  environment.gnome3.excludePackages = [ pkgs.epiphany pkgs.gnome3.geary ];
-
-  hardware.bluetooth.enable = true;
-
-  programs.fish.enable = true;
-  programs.fish.promptInit = ''
-    fish-nix-shell --info-right | source
-  '';
-  users.mutableUsers = false;
-  users.defaultUserShell = pkgs.fish;
-  users.extraGroups.plugdev = { };
-  users.extraUsers = import ./common-users.nix { inherit pkgs; };
-  security.sudo.wheelNeedsPassword = false;
-  services.udev.packages = [ m-labs.openocd ];
-  services.udev.extraRules = ''
-# leaf maple
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1eaf", ATTRS{idProduct}=="0003", MODE="0660", GROUP="plugdev"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1eaf", ATTRS{idProduct}=="0004", MODE="0660", GROUP="plugdev"
-# glasgow
-SUBSYSTEM=="usb", ATTRS{idVendor}=="20b7", ATTRS{idProduct}=="9db1", MODE="0660", GROUP="plugdev"
-# hackrf
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1d50", ATTRS{idProduct}=="6089", MODE="0660", GROUP="plugdev"
-# bladerf
-SUBSYSTEM=="usb", ATTRS{idVendor}=="2cf0", ATTRS{idProduct}=="5250", MODE="0660", GROUP="plugdev"
-# personal measurement device
-SUBSYSTEM=="usb", ATTRS{idVendor}=="09db", ATTRS{idProduct}=="007a", MODE="0660", GROUP="plugdev"
-# saleae
-SUBSYSTEM=="usb", ATTRS{idVendor}=="0925", ATTRS{idProduct}=="3881", MODE="0660", GROUP="plugdev"
-# ocean optics
-SUBSYSTEM=="usb", ATTRS{idVendor}=="2457", ATTRS{idProduct}=="1002", MODE="0660", GROUP="plugdev"
-# yubikey
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1050", ATTRS{idProduct}=="0116", MODE="0660", GROUP="plugdev"
-  '';
-
-  nix.binaryCachePublicKeys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
-  nix.binaryCaches = ["https://nixbld.m-labs.hk" "https://cache.nixos.org"];
-  nix.sandboxPaths = ["/opt"];
-
-  # This value determines the NixOS release with which your system is to be
-  # compatible, in order to avoid breaking some software such as database
-  # servers. You should change this only after NixOS release notes say you
-  # should.
-  system.stateVersion = "19.03"; # Did you read the comment?
-}
--- a/nixops/fish-nix-shell/LICENSE
+++ b/nixops/fish-nix-shell/LICENSE
@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2018 haslersn
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
--- a/nixops/fish-nix-shell/README.md
+++ b/nixops/fish-nix-shell/README.md
@ -1,50 +0,0 @@
-# fish-nix-shell
-fish support for the *nix-shell* environment of the Nix package manager.
-
-## Installation
-
-### Installation in the user environment
-
-Execute
-
-```
-nix-env -if https://github.com/haslersn/fish-nix-shell/archive/master.tar.gz
-```
-
-and add the following to your *~/.config/fish/config.fish*. Create it if it doesn't exist.
-
-```
-fish-nix-shell --info-right | source
-```
-
-### System-wide installation
-
-Add the package to your */etc/nixos/configuration.nix*:
-
-```
-  environment.systemPackages = with pkgs; [
-    #
-    # Other packages here ...
-    #
-    (import (fetchGit "https://github.com/haslersn/fish-nix-shell"))
-  ];
-```
-
-and then execute: `sudo nixos-rebuild switch`
-
-If you want to configure it system-wide, also add:
-
-```
-  programs.fish.enable = true;
-  programs.fish.promptInit = ''
-    fish-nix-shell --info-right | source
-  '';
-```
-
-## Flags
-
-The `fish-nix-shell` command **optionally** takes the following flags:
-
-| Flag | Meaning |
-| - | - |
-| `--info-right` | While in a *fish-nix-shell*, display information about the loaded packages at the right.
--- a/nixops/fish-nix-shell/bin/fish-nix-shell
+++ b/nixops/fish-nix-shell/bin/fish-nix-shell
@ -1,34 +0,0 @@
-#!/bin/sh
-
-function init_fish () {
-                cat <<EOF
-
-# Overwrite the nix-shell command
-function nix-shell
-    fish-nix-shell-wrapper \$argv
-    set -gx FISH_NIX_SHELL_EXIT_STATUS \$status
-end
-EOF
-    for arg in "$@"; do
-        case "$arg" in
-            --info-right)
-                cat <<EOF
-
-# Print additional information inside a nix-shell environment
-function fish_right_prompt
-    nix-shell-info
-    set -e FISH_NIX_SHELL_EXIT_STATUS
-end
-EOF
-                ;;
-            *) exit 1;;
-        esac
-    done
-}
-
-cat <<EOF
-# If you see this output, you probably forgot to pipe this output into 'source':
-# fish-nix-shell $@ | source
-EOF
-
-init_fish "$@"
--- a/nixops/fish-nix-shell/bin/fish-nix-shell-wrapper
+++ b/nixops/fish-nix-shell/bin/fish-nix-shell-wrapper
@ -1,22 +0,0 @@
-#!/bin/sh
-fns () {
-    pkgs=$FISH_NIX_SHELL_PKGS
-    for arg in "$@"; do
-        if [[ $arg == -* ]]; then
-            pkg=
-            if [[ $arg == --pure ]] || [[ $arg == --command ]] || [[ $arg == --run ]]; then
-                command nix-shell $@
-                return
-            elif [[ $arg == -p ]] || [[ $arg == --packages ]]; then
-                pkg=1
-            fi
-        elif [[ $pkg == 1 ]]; then
-            pkgs+=" "$arg
-        fi
-    done
-    if [[ -n $name ]] && [[ $name != shell ]]; then
-        pkgs+=" "$name
-    fi
-    env FISH_NIX_SHELL_PKGS="$pkgs" nix-shell "$@" --command fish
-}
-fns "$@"
--- a/nixops/fish-nix-shell/bin/nix-shell-info
+++ b/nixops/fish-nix-shell/bin/nix-shell-info
@ -1,21 +0,0 @@
-#!/bin/sh
-if [[ $IN_NIX_SHELL != "" ]]; then
-    printf "\033[1;32m"
-    output=$(echo $FISH_NIX_SHELL_PKGS | xargs)
-    if [[ -n $name ]] && [[ $name != shell ]]; then
-        output+=" "$name
-    fi
-    if [[ -n $output ]]; then
-        output=$(echo $output $additional_pkgs | tr ' ' '\n' | sort -u | tr '\n' ' ' | xargs)
-        printf "$output "
-    else
-        printf "[unknown nix-shell] "
-    fi
-    printf "\033[0m"
-elif [[ $FISH_NIX_SHELL_EXIT_STATUS ]]; then
-    if [[ $FISH_NIX_SHELL_EXIT_STATUS == 0 ]]; then
-      printf "\033[1;36mexited nix-shell \033[0m"
-    else
-      printf "\033[1;31mERROR \033[0m"
-    fi
-fi
--- a/nixops/fish-nix-shell/default.nix
+++ b/nixops/fish-nix-shell/default.nix
@ -1,16 +0,0 @@
-with import <nixpkgs> {}; stdenv.mkDerivation rec {
-  name = "fish-nix-shell";
-  src = fetchGit "https://github.com/haslersn/fish-nix-shell";
-  nativeBuildInputs = [ makeWrapper ];
-  installPhase = ''
-    mkdir -p $out
-    cp LICENSE $out
-    cp -r bin $out
-    wrapProgram $out/bin/fish-nix-shell
-    wrapProgram $out/bin/fish-nix-shell-wrapper --prefix PATH ":" ${fish}/bin
-    wrapProgram $out/bin/nix-shell-info
-  '';
-  meta.description = "fish support for the nix-shell environment of the Nix package manager.";
-  meta.license = "MIT";
-  meta.homepage = https://github.com/haslersn/fish-nix-shell;
-}
--- a/nixops/hera-hardware-configuration.nix
+++ b/nixops/hera-hardware-configuration.nix
@ -1,33 +0,0 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, ... }:
-
-{
-  imports =
-    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
-    ];
-
-  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usbhid" "usb_storage" "sd_mod" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/a86f2eff-c873-4af1-bb80-a903383b9c8c";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/8C30-F6DC";
-      fsType = "vfat";
-    };
-
-  swapDevices = [ ];
-
-  nix.maxJobs = lib.mkDefault 16;
-  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
-
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-}
--- a/nixops/hestia-hardware-configuration.nix
+++ b/nixops/hestia-hardware-configuration.nix
@ -1,33 +0,0 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, ... }:
-
-{
-  imports =
-    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
-    ];
-
-  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usbhid" "usb_storage" "sd_mod" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/2fe28058-4186-4e65-9d3d-f7ec5dffc171";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/E085-5F21";
-      fsType = "vfat";
-    };
-
-  swapDevices = [ ];
-
-  nix.maxJobs = lib.mkDefault 16;
-  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
-
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-}
--- a/nixops/juno-hardware-configuration.nix
+++ b/nixops/juno-hardware-configuration.nix
@ -1,30 +0,0 @@
-{ 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;
-}
--- a/nixops/light.nix
+++ b/nixops/light.nix
@ -1,112 +0,0 @@
-{ host }:
-
-{ config, pkgs, ... }:
-{
-  deployment.targetHost = host;
-
-  disabledModules = [ "security/pam.nix" ];
-  imports =
-    [
-      (./. + "/${host}-hardware-configuration.nix")
-      ./pam_p11
-    ];
-
-  networking.hostName = host;
-
-  time.timeZone = "Asia/Hong_Kong";
-
-  # List packages installed in system profile. To search, run:
-  # $ nix search wget
-  documentation.enable = false;
-  nixpkgs.config.allowUnfree = true;
-  environment.systemPackages = with pkgs; [
-    opensc
-    wget vim git firefox usbutils pciutils file lm_sensors acpi
-    gimp imagemagick
-    (python3.withPackages(ps: with ps; [ numpy scipy ]))
-    psmisc
-    telnet unzip zip gnupg
-    sublime3 rink
-    tmux screen tigervnc
-    (import ./fish-nix-shell)
-  ];
-  programs.wireshark.enable = true;
-
-  services.openssh.enable = true;
-  services.openssh.forwardX11 = true;
-  services.openssh.passwordAuthentication = false;
-  hardware.u2f.enable = true;
-  services.pcscd.enable = true;
-  programs.ssh.extraConfig =
-    ''
-    PKCS11Provider "${pkgs.opensc}/lib/opensc-pkcs11.so"
-    '';
-  programs.ssh.startAgent = true;
-  programs.ssh.agentPKCS11Whitelist = "${pkgs.opensc}/lib/opensc-pkcs11.so";
-  security.pam.p11.enable = true;
-
-  # Enable CUPS to print documents.
-  services.printing = {
-    enable = true;
-    extraConf =
-      ''
-      Browsing Off
-      BrowseLocalProtocols none
-      '';
-    browsedConf =
-      ''
-      BrowseRemoteProtocols none
-      BrowseProtocols none
-      '';
-  };
-  services.avahi = {
-    enable = true;
-    nssmdns = true;
-  };
-
-  # Enable sound.
-  sound.enable = true;
-  hardware.pulseaudio = {
-    enable = true;
-    extraModules = [ pkgs.pulseaudio-modules-bt ];
-    package = pkgs.pulseaudioFull;
-  };
-
-  i18n.inputMethod = {
-    enabled = "fcitx";
-    fcitx.engines = with pkgs.fcitx-engines; [ table-extra m17n ];
-  };
-  fonts.fonts = [ pkgs.noto-fonts pkgs.noto-fonts-cjk pkgs.noto-fonts-emoji pkgs.noto-fonts-extra ];
-
-  # Enable the X11 windowing system.
-  services.xserver.enable = true;
-  services.xserver.layout = "us";
-  services.xserver.xkbOptions = "eurosign:e";
-
-  # Enable touchpad support.
-  services.xserver.libinput.enable = true;
-
-  services.xserver.displayManager.lightdm.enable = true;
-  services.xserver.desktopManager.xfce.enable = true;
-
-  programs.fish.enable = true;
-  programs.fish.promptInit = ''
-    fish-nix-shell --info-right | source
-  '';
-  users.mutableUsers = false;
-  users.defaultUserShell = pkgs.fish;
-  users.extraGroups.plugdev = { };
-  users.extraUsers = import ./common-users.nix { inherit pkgs; };
-  
-  security.sudo.wheelNeedsPassword = false;
-
-  nix.binaryCachePublicKeys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
-  nix.binaryCaches = ["https://nixbld.m-labs.hk" "https://cache.nixos.org"];
-  nix.sandboxPaths = ["/opt"];
-
-  # This value determines the NixOS release with which your system is to be
-  # compatible, in order to avoid breaking some software such as database
-  # servers. You should change this only after NixOS release notes say you
-  # should.
-  system.stateVersion = "19.03"; # Did you read the comment?
-}
--- a/nixops/nixops.nix
+++ b/nixops/nixops.nix
@ -1,13 +0,0 @@
-{
-  rpi-1 = import ./rpi.nix { host = "rpi-1"; rpi4 = false; };
-  rpi-2 = import ./rpi.nix { host = "rpi-2"; rpi4 = false; };
-  rpi-3 = import ./rpi.nix { host = "rpi-3"; rpi4 = true; };
-  rpi-4 = import ./rpi.nix { host = "rpi-4"; rpi4 = true; };
-  rpi-5 = import ./rpi.nix { host = "rpi-5"; rpi4 = true; };
-  juno = import ./desktop.nix { host = "juno"; };
-  zeus = import ./desktop.nix { host = "zeus"; };
-  hera = import ./desktop.nix { host = "hera"; };
-  hestia = import ./desktop.nix { host = "hestia"; };
-  chiron = import ./desktop.nix { host = "chiron"; };
-  cnc = import ./light.nix { host = "cnc"; };
-}
--- a/nixops/pam_p11/default.nix
+++ b/nixops/pam_p11/default.nix
@ -1,843 +0,0 @@
-# This module provides configuration for the PAM (Pluggable
-# Authentication Modules) system.
-
-{ config, lib, pkgs, ... }:
-
-with lib;
-
-let
-  pam_p11 = pkgs.callPackage ./pam_p11.nix {};
-
-  parentConfig = config;
-
-  pamOpts = { config, name, ... }: let cfg = config; in let config = parentConfig; in {
-
-    options = {
-
-      name = mkOption {
-        example = "sshd";
-        type = types.str;
-        description = "Name of the PAM service.";
-      };
-
-      unixAuth = mkOption {
-        default = true;
-        type = types.bool;
-        description = ''
-          Whether users can log in with passwords defined in
-          <filename>/etc/shadow</filename>.
-        '';
-      };
-
-      rootOK = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          If set, root doesn't need to authenticate (e.g. for the
-          <command>useradd</command> service).
-        '';
-      };
-
-      p11Auth = mkOption {
-        default = config.security.pam.p11.enable;
-        type = types.bool;
-        description = ''
-          If set, keys listed in
-          <filename>~/.ssh/authorized_keys</filename> and
-          <filename>~/.eid/authorized_certificates</filename>
-          can be used to log in with the associated PKCS#11 tokens.
-        '';
-      };
-
-      u2fAuth = mkOption {
-        default = config.security.pam.u2f.enable;
-        type = types.bool;
-        description = ''
-          If set, users listed in
-          <filename>$XDG_CONFIG_HOME/Yubico/u2f_keys</filename> (or
-          <filename>$HOME/.config/Yubico/u2f_keys</filename> if XDG variable is
-          not set) are able to log in with the associated U2F key. Path can be
-          changed using <option>security.pam.u2f.authFile</option> option.
-        '';
-      };
-
-      yubicoAuth = mkOption {
-        default = config.security.pam.yubico.enable;
-        type = types.bool;
-        description = ''
-          If set, users listed in
-          <filename>~/.yubico/authorized_yubikeys</filename>
-          are able to log in with the associated Yubikey tokens.
-        '';
-      };
-
-      googleAuthenticator = {
-        enable = mkOption {
-          default = false;
-          type = types.bool;
-          description = ''
-            If set, users with enabled Google Authenticator (created
-            <filename>~/.google_authenticator</filename>) will be required
-            to provide Google Authenticator token to log in.
-          '';
-        };
-      };
-
-      usbAuth = mkOption {
-        default = config.security.pam.usb.enable;
-        type = types.bool;
-        description = ''
-          If set, users listed in
-          <filename>/etc/pamusb.conf</filename> are able to log in
-          with the associated USB key.
-        '';
-      };
-
-      otpwAuth = mkOption {
-        default = config.security.pam.enableOTPW;
-        type = types.bool;
-        description = ''
-          If set, the OTPW system will be used (if
-          <filename>~/.otpw</filename> exists).
-        '';
-      };
-
-      googleOsLoginAccountVerification = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          If set, will use the Google OS Login PAM modules
-          (<literal>pam_oslogin_login</literal>,
-          <literal>pam_oslogin_admin</literal>) to verify possible OS Login
-          users and set sudoers configuration accordingly.
-          This only makes sense to enable for the <literal>sshd</literal> PAM
-          service.
-        '';
-      };
-
-      googleOsLoginAuthentication = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          If set, will use the <literal>pam_oslogin_login</literal>'s user
-          authentication methods to authenticate users using 2FA.
-          This only makes sense to enable for the <literal>sshd</literal> PAM
-          service.
-        '';
-      };
-
-      fprintAuth = mkOption {
-        default = config.services.fprintd.enable;
-        type = types.bool;
-        description = ''
-          If set, fingerprint reader will be used (if exists and
-          your fingerprints are enrolled).
-        '';
-      };
-
-      oathAuth = mkOption {
-        default = config.security.pam.oath.enable;
-        type = types.bool;
-        description = ''
-          If set, the OATH Toolkit will be used.
-        '';
-      };
-
-      sshAgentAuth = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          If set, the calling user's SSH agent is used to authenticate
-          against the keys in the calling user's
-          <filename>~/.ssh/authorized_keys</filename>.  This is useful
-          for <command>sudo</command> on password-less remote systems.
-        '';
-      };
-
-      duoSecurity = {
-        enable = mkOption {
-          default = false;
-          type = types.bool;
-          description = ''
-            If set, use the Duo Security pam module
-            <literal>pam_duo</literal> for authentication.  Requires
-            configuration of <option>security.duosec</option> options.
-          '';
-        };
-      };
-
-      startSession = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          If set, the service will register a new session with
-          systemd's login manager.  For local sessions, this will give
-          the user access to audio devices, CD-ROM drives.  In the
-          default PolicyKit configuration, it also allows the user to
-          reboot the system.
-        '';
-      };
-
-      setEnvironment = mkOption {
-        type = types.bool;
-        default = true;
-        description = ''
-          Whether the service should set the environment variables
-          listed in <option>environment.sessionVariables</option>
-          using <literal>pam_env.so</literal>.
-        '';
-      };
-
-      setLoginUid = mkOption {
-        type = types.bool;
-        description = ''
-          Set the login uid of the process
-          (<filename>/proc/self/loginuid</filename>) for auditing
-          purposes.  The login uid is only set by ‘entry points’ like
-          <command>login</command> and <command>sshd</command>, not by
-          commands like <command>sudo</command>.
-        '';
-      };
-
-      forwardXAuth = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Whether X authentication keys should be passed from the
-          calling user to the target user (e.g. for
-          <command>su</command>)
-        '';
-      };
-
-      pamMount = mkOption {
-        default = config.security.pam.mount.enable;
-        type = types.bool;
-        description = ''
-          Enable PAM mount (pam_mount) system to mount fileystems on user login.
-        '';
-      };
-
-      allowNullPassword = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Whether to allow logging into accounts that have no password
-          set (i.e., have an empty password field in
-          <filename>/etc/passwd</filename> or
-          <filename>/etc/group</filename>).  This does not enable
-          logging into disabled accounts (i.e., that have the password
-          field set to <literal>!</literal>).  Note that regardless of
-          what the pam_unix documentation says, accounts with hashed
-          empty passwords are always allowed to log in.
-        '';
-      };
-
-      nodelay = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Wheather the delay after typing a wrong password should be disabled.
-        '';
-      };
-
-      requireWheel = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Whether to permit root access only to members of group wheel.
-        '';
-      };
-
-      limits = mkOption {
-        description = ''
-          Attribute set describing resource limits.  Defaults to the
-          value of <option>security.pam.loginLimits</option>.
-        '';
-      };
-
-      showMotd = mkOption {
-        default = false;
-        type = types.bool;
-        description = "Whether to show the message of the day.";
-      };
-
-      makeHomeDir = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Whether to try to create home directories for users
-          with <literal>$HOME</literal>s pointing to nonexistent
-          locations on session login.
-        '';
-      };
-
-      updateWtmp = mkOption {
-        default = false;
-        type = types.bool;
-        description = "Whether to update <filename>/var/log/wtmp</filename>.";
-      };
-
-      logFailures = mkOption {
-        default = false;
-        type = types.bool;
-        description = "Whether to log authentication failures in <filename>/var/log/faillog</filename>.";
-      };
-
-      enableAppArmor = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Enable support for attaching AppArmor profiles at the
-          user/group level, e.g., as part of a role based access
-          control scheme.
-        '';
-      };
-
-      enableKwallet = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          If enabled, pam_wallet will attempt to automatically unlock the
-          user's default KDE wallet upon login. If the user has no wallet named
-          "kdewallet", or the login password does not match their wallet
-          password, KDE will prompt separately after login.
-        '';
-      };
-      sssdStrictAccess = mkOption {
-        default = false;
-        type = types.bool;
-        description = "enforce sssd access control";
-      };
-
-      enableGnomeKeyring = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          If enabled, pam_gnome_keyring will attempt to automatically unlock the
-          user's default Gnome keyring upon login. If the user login password does
-          not match their keyring password, Gnome Keyring will prompt separately
-          after login.
-        '';
-      };
-
-      text = mkOption {
-        type = types.nullOr types.lines;
-        description = "Contents of the PAM service file.";
-      };
-
-    };
-
-    config = {
-      name = mkDefault name;
-      setLoginUid = mkDefault cfg.startSession;
-      limits = mkDefault config.security.pam.loginLimits;
-
-      # !!! TODO: move the LDAP stuff to the LDAP module, and the
-      # Samba stuff to the Samba module.  This requires that the PAM
-      # module provides the right hooks.
-      text = mkDefault
-        (''
-          # Account management.
-          account required pam_unix.so
-          ${optionalString use_ldap
-              "account sufficient ${pam_ldap}/lib/security/pam_ldap.so"}
-          ${optionalString (config.services.sssd.enable && cfg.sssdStrictAccess==false)
-              "account sufficient ${pkgs.sssd}/lib/security/pam_sss.so"}
-          ${optionalString (config.services.sssd.enable && cfg.sssdStrictAccess)
-              "account [default=bad success=ok user_unknown=ignore] ${pkgs.sssd}/lib/security/pam_sss.so"}
-          ${optionalString config.krb5.enable
-              "account sufficient ${pam_krb5}/lib/security/pam_krb5.so"}
-          ${optionalString cfg.googleOsLoginAccountVerification ''
-            account [success=ok ignore=ignore default=die] ${pkgs.google-compute-engine-oslogin}/lib/pam_oslogin_login.so
-            account [success=ok default=ignore] ${pkgs.google-compute-engine-oslogin}/lib/pam_oslogin_admin.so
-          ''}
-
-          # Authentication management.
-          ${optionalString cfg.googleOsLoginAuthentication
-              "auth [success=done perm_denied=bad default=ignore] ${pkgs.google-compute-engine-oslogin}/lib/pam_oslogin_login.so"}
-          ${optionalString cfg.rootOK
-              "auth sufficient pam_rootok.so"}
-          ${optionalString cfg.requireWheel
-              "auth required pam_wheel.so use_uid"}
-          ${optionalString cfg.logFailures
-              "auth required pam_tally.so"}
-          ${optionalString (config.security.pam.enableSSHAgentAuth && cfg.sshAgentAuth)
-              "auth sufficient ${pkgs.pam_ssh_agent_auth}/libexec/pam_ssh_agent_auth.so file=~/.ssh/authorized_keys:~/.ssh/authorized_keys2:/etc/ssh/authorized_keys.d/%u"}
-          ${optionalString cfg.fprintAuth
-              "auth sufficient ${pkgs.fprintd}/lib/security/pam_fprintd.so"}
-          ${let p11 = config.security.pam.p11; in optionalString cfg.p11Auth
-              "auth ${p11.control} ${pam_p11}/lib/security/pam_p11.so ${pkgs.opensc}/lib/opensc-pkcs11.so"}
-          ${let u2f = config.security.pam.u2f; in optionalString cfg.u2fAuth
-              "auth ${u2f.control} ${pkgs.pam_u2f}/lib/security/pam_u2f.so ${optionalString u2f.debug "debug"} ${optionalString (u2f.authFile != null) "authfile=${u2f.authFile}"} ${optionalString u2f.interactive "interactive"} ${optionalString u2f.cue "cue"}"}
-          ${optionalString cfg.usbAuth
-              "auth sufficient ${pkgs.pam_usb}/lib/security/pam_usb.so"}
-          ${let oath = config.security.pam.oath; in optionalString cfg.oathAuth
-              "auth requisite ${pkgs.oathToolkit}/lib/security/pam_oath.so window=${toString oath.window} usersfile=${toString oath.usersFile} digits=${toString oath.digits}"}
-          ${let yubi = config.security.pam.yubico; in optionalString cfg.yubicoAuth
-              "auth ${yubi.control} ${pkgs.yubico-pam}/lib/security/pam_yubico.so mode=${toString yubi.mode} ${optionalString (yubi.mode == "client") "id=${toString yubi.id}"} ${optionalString yubi.debug "debug"}"}
-        '' +
-          # Modules in this block require having the password set in PAM_AUTHTOK.
-          # pam_unix is marked as 'sufficient' on NixOS which means nothing will run
-          # after it succeeds. Certain modules need to run after pam_unix
-          # prompts the user for password so we run it once with 'required' at an
-          # earlier point and it will run again with 'sufficient' further down.
-          # We use try_first_pass the second time to avoid prompting password twice
-          (optionalString (cfg.unixAuth &&
-          (config.security.pam.enableEcryptfs
-            || cfg.pamMount
-            || cfg.enableKwallet
-            || cfg.enableGnomeKeyring
-            || cfg.googleAuthenticator.enable
-            || cfg.duoSecurity.enable)) ''
-              auth required pam_unix.so ${optionalString cfg.allowNullPassword "nullok"} ${optionalString cfg.nodelay "nodelay"} likeauth
-              ${optionalString config.security.pam.enableEcryptfs
-                "auth optional ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so unwrap"}
-              ${optionalString cfg.pamMount
-                "auth optional ${pkgs.pam_mount}/lib/security/pam_mount.so"}
-              ${optionalString cfg.enableKwallet
-                ("auth optional ${pkgs.plasma5.kwallet-pam}/lib/security/pam_kwallet5.so" +
-                 " kwalletd=${pkgs.libsForQt5.kwallet.bin}/bin/kwalletd5")}
-              ${optionalString cfg.enableGnomeKeyring
-                "auth optional ${pkgs.gnome3.gnome-keyring}/lib/security/pam_gnome_keyring.so"}
-              ${optionalString cfg.googleAuthenticator.enable
-                "auth required ${pkgs.googleAuthenticator}/lib/security/pam_google_authenticator.so no_increment_hotp"}
-              ${optionalString cfg.duoSecurity.enable
-                "auth required ${pkgs.duo-unix}/lib/security/pam_duo.so"}
-            '') + ''
-          ${optionalString cfg.unixAuth
-              "auth sufficient pam_unix.so ${optionalString cfg.allowNullPassword "nullok"} ${optionalString cfg.nodelay "nodelay"} likeauth try_first_pass"}
-          ${optionalString cfg.otpwAuth
-              "auth sufficient ${pkgs.otpw}/lib/security/pam_otpw.so"}
-          ${optionalString use_ldap
-              "auth sufficient ${pam_ldap}/lib/security/pam_ldap.so use_first_pass"}
-          ${optionalString config.services.sssd.enable
-              "auth sufficient ${pkgs.sssd}/lib/security/pam_sss.so use_first_pass"}
-          ${optionalString config.krb5.enable ''
-            auth [default=ignore success=1 service_err=reset] ${pam_krb5}/lib/security/pam_krb5.so use_first_pass
-            auth [default=die success=done] ${pam_ccreds}/lib/security/pam_ccreds.so action=validate use_first_pass
-            auth sufficient ${pam_ccreds}/lib/security/pam_ccreds.so action=store use_first_pass
-          ''}
-          auth required pam_deny.so
-
-          # Password management.
-          password sufficient pam_unix.so nullok sha512
-          ${optionalString config.security.pam.enableEcryptfs
-              "password optional ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so"}
-          ${optionalString cfg.pamMount
-              "password optional ${pkgs.pam_mount}/lib/security/pam_mount.so"}
-          ${optionalString use_ldap
-              "password sufficient ${pam_ldap}/lib/security/pam_ldap.so"}
-          ${optionalString config.services.sssd.enable
-              "password sufficient ${pkgs.sssd}/lib/security/pam_sss.so use_authtok"}
-          ${optionalString config.krb5.enable
-              "password sufficient ${pam_krb5}/lib/security/pam_krb5.so use_first_pass"}
-          ${optionalString config.services.samba.syncPasswordsByPam
-              "password optional ${pkgs.samba}/lib/security/pam_smbpass.so nullok use_authtok try_first_pass"}
-          ${optionalString cfg.enableGnomeKeyring
-              "password optional ${pkgs.gnome3.gnome-keyring}/lib/security/pam_gnome_keyring.so use_authtok"}
-
-          # Session management.
-          ${optionalString cfg.setEnvironment ''
-            session required pam_env.so conffile=${config.system.build.pamEnvironment} readenv=0
-          ''}
-          session required pam_unix.so
-          ${optionalString cfg.setLoginUid
-              "session ${
-                if config.boot.isContainer then "optional" else "required"
-              } pam_loginuid.so"}
-          ${optionalString cfg.makeHomeDir
-              "session required ${pkgs.pam}/lib/security/pam_mkhomedir.so silent skel=${config.security.pam.makeHomeDir.skelDirectory} umask=0022"}
-          ${optionalString cfg.updateWtmp
-              "session required ${pkgs.pam}/lib/security/pam_lastlog.so silent"}
-          ${optionalString config.security.pam.enableEcryptfs
-              "session optional ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so"}
-          ${optionalString use_ldap
-              "session optional ${pam_ldap}/lib/security/pam_ldap.so"}
-          ${optionalString config.services.sssd.enable
-              "session optional ${pkgs.sssd}/lib/security/pam_sss.so"}
-          ${optionalString config.krb5.enable
-              "session optional ${pam_krb5}/lib/security/pam_krb5.so"}
-          ${optionalString cfg.otpwAuth
-              "session optional ${pkgs.otpw}/lib/security/pam_otpw.so"}
-          ${optionalString cfg.startSession
-              "session optional ${pkgs.systemd}/lib/security/pam_systemd.so"}
-          ${optionalString cfg.forwardXAuth
-              "session optional pam_xauth.so xauthpath=${pkgs.xorg.xauth}/bin/xauth systemuser=99"}
-          ${optionalString (cfg.limits != [])
-              "session required ${pkgs.pam}/lib/security/pam_limits.so conf=${makeLimitsConf cfg.limits}"}
-          ${optionalString (cfg.showMotd && config.users.motd != null)
-              "session optional ${pkgs.pam}/lib/security/pam_motd.so motd=${motd}"}
-          ${optionalString cfg.pamMount
-              "session optional ${pkgs.pam_mount}/lib/security/pam_mount.so"}
-          ${optionalString (cfg.enableAppArmor && config.security.apparmor.enable)
-              "session optional ${pkgs.apparmor-pam}/lib/security/pam_apparmor.so order=user,group,default debug"}
-          ${optionalString (cfg.enableKwallet)
-              ("session optional ${pkgs.plasma5.kwallet-pam}/lib/security/pam_kwallet5.so" +
-               " kwalletd=${pkgs.libsForQt5.kwallet.bin}/bin/kwalletd5")}
-          ${optionalString (cfg.enableGnomeKeyring)
-              "session optional ${pkgs.gnome3.gnome-keyring}/lib/security/pam_gnome_keyring.so auto_start"}
-          ${optionalString (config.virtualisation.lxc.lxcfs.enable)
-               "session optional ${pkgs.lxc}/lib/security/pam_cgfs.so -c all"}
-        '');
-    };
-
-  };
-
-
-  inherit (pkgs) pam_krb5 pam_ccreds;
-
-  use_ldap = (config.users.ldap.enable && config.users.ldap.loginPam);
-  pam_ldap = if config.users.ldap.daemon.enable then pkgs.nss_pam_ldapd else pkgs.pam_ldap;
-
-  # Create a limits.conf(5) file.
-  makeLimitsConf = limits:
-    pkgs.writeText "limits.conf"
-       (concatMapStrings ({ domain, type, item, value }:
-         "${domain} ${type} ${item} ${toString value}\n")
-         limits);
-
-  motd = pkgs.writeText "motd" config.users.motd;
-
-  makePAMService = name: service:
-    { name = "pam.d/${name}";
-      value.source = pkgs.writeText "${name}.pam" service.text;
-    };
-
-in
-
-{
-
-  imports = [
-    (mkRenamedOptionModule [ "security" "pam" "enableU2F" ] [ "security" "pam" "u2f" "enable" ])
-  ];
-
-  ###### interface
-
-  options = {
-
-    security.pam.loginLimits = mkOption {
-      default = [];
-      example =
-        [ { domain = "ftp";
-            type   = "hard";
-            item   = "nproc";
-            value  = "0";
-          }
-          { domain = "@student";
-            type   = "-";
-            item   = "maxlogins";
-            value  = "4";
-          }
-       ];
-
-     description =
-       '' Define resource limits that should apply to users or groups.
-          Each item in the list should be an attribute set with a
-          <varname>domain</varname>, <varname>type</varname>,
-          <varname>item</varname>, and <varname>value</varname>
-          attribute.  The syntax and semantics of these attributes
-          must be that described in the limits.conf(5) man page.
-
-          Note that these limits do not apply to systemd services,
-          whose limits can be changed via <option>systemd.extraConfig</option>
-          instead.
-       '';
-    };
-
-    security.pam.services = mkOption {
-      default = [];
-      type = with types; loaOf (submodule pamOpts);
-      description =
-        ''
-          This option defines the PAM services.  A service typically
-          corresponds to a program that uses PAM,
-          e.g. <command>login</command> or <command>passwd</command>.
-          Each attribute of this set defines a PAM service, with the attribute name
-          defining the name of the service.
-        '';
-    };
-
-    security.pam.makeHomeDir.skelDirectory = mkOption {
-      type = types.str;
-      default = "/var/empty";
-      example =  "/etc/skel";
-      description = ''
-        Path to skeleton directory whose contents are copied to home
-        directories newly created by <literal>pam_mkhomedir</literal>.
-      '';
-    };
-
-    security.pam.enableSSHAgentAuth = mkOption {
-      type = types.bool;
-      default = false;
-      description =
-        ''
-          Enable sudo logins if the user's SSH agent provides a key
-          present in <filename>~/.ssh/authorized_keys</filename>.
-          This allows machines to exclusively use SSH keys instead of
-          passwords.
-        '';
-    };
-
-    security.pam.enableOTPW = mkEnableOption "the OTPW (one-time password) PAM module";
-
-    security.pam.p11 = {
-      enable = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Enables P11 PAM (<literal>pam_p11</literal>) module.
-
-          If set, users can log in with SSH keys and PKCS#11 tokens.
-
-          More information can be found <link
-          xlink:href="https://github.com/OpenSC/pam_p11">here</link>.
-        '';
-      };
-
-      control = mkOption {
-        default = "sufficient";
-        type = types.enum [ "required" "requisite" "sufficient" "optional" ];
-        description = ''
-          This option sets pam "control".
-          If you want to have multi factor authentication, use "required".
-          If you want to use the PKCS#11 device instead of the regular password,
-          use "sufficient".
-
-          Read
-          <citerefentry>
-            <refentrytitle>pam.conf</refentrytitle>
-            <manvolnum>5</manvolnum>
-          </citerefentry>
-          for better understanding of this option.
-        '';
-      };
-    };
-
-    security.pam.u2f = {
-      enable = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Enables U2F PAM (<literal>pam-u2f</literal>) module.
-
-          If set, users listed in
-          <filename>$XDG_CONFIG_HOME/Yubico/u2f_keys</filename> (or
-          <filename>$HOME/.config/Yubico/u2f_keys</filename> if XDG variable is
-          not set) are able to log in with the associated U2F key. The path can
-          be changed using <option>security.pam.u2f.authFile</option> option.
-
-          File format is:
-          <literal>username:first_keyHandle,first_public_key: second_keyHandle,second_public_key</literal>
-          This file can be generated using <command>pamu2fcfg</command> command.
-
-          More information can be found <link
-          xlink:href="https://developers.yubico.com/pam-u2f/">here</link>.
-        '';
-      };
-
-      authFile = mkOption {
-        default = null;
-        type = with types; nullOr path;
-        description = ''
-          By default <literal>pam-u2f</literal> module reads the keys from
-          <filename>$XDG_CONFIG_HOME/Yubico/u2f_keys</filename> (or
-          <filename>$HOME/.config/Yubico/u2f_keys</filename> if XDG variable is
-          not set).
-
-          If you want to change auth file locations or centralize database (for
-          example use <filename>/etc/u2f-mappings</filename>) you can set this
-          option.
-
-          File format is:
-          <literal>username:first_keyHandle,first_public_key: second_keyHandle,second_public_key</literal>
-          This file can be generated using <command>pamu2fcfg</command> command.
-
-          More information can be found <link
-          xlink:href="https://developers.yubico.com/pam-u2f/">here</link>.
-        '';
-      };
-
-      control = mkOption {
-        default = "sufficient";
-        type = types.enum [ "required" "requisite" "sufficient" "optional" ];
-        description = ''
-          This option sets pam "control".
-          If you want to have multi factor authentication, use "required".
-          If you want to use U2F device instead of regular password, use "sufficient".
-
-          Read
-          <citerefentry>
-            <refentrytitle>pam.conf</refentrytitle>
-            <manvolnum>5</manvolnum>
-          </citerefentry>
-          for better understanding of this option.
-        '';
-      };
-
-      debug = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Debug output to stderr.
-        '';
-      };
-
-      interactive = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Set to prompt a message and wait before testing the presence of a U2F device.
-          Recommended if your device doesn’t have a tactile trigger.
-        '';
-      };
-
-      cue = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          By default <literal>pam-u2f</literal> module does not inform user
-          that he needs to use the u2f device, it just waits without a prompt.
-
-          If you set this option to <literal>true</literal>,
-          <literal>cue</literal> option is added to <literal>pam-u2f</literal>
-          module and reminder message will be displayed.
-        '';
-      };
-    };
-
-    security.pam.yubico = {
-      enable = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Enables Yubico PAM (<literal>yubico-pam</literal>) module.
-
-          If set, users listed in
-          <filename>~/.yubico/authorized_yubikeys</filename>
-          are able to log in with the associated Yubikey tokens.
-
-          The file must have only one line:
-          <literal>username:yubikey_token_id1:yubikey_token_id2</literal>
-          More information can be found <link
-          xlink:href="https://developers.yubico.com/yubico-pam/">here</link>.
-        '';
-      };
-      control = mkOption {
-        default = "sufficient";
-        type = types.enum [ "required" "requisite" "sufficient" "optional" ];
-        description = ''
-          This option sets pam "control".
-          If you want to have multi factor authentication, use "required".
-          If you want to use Yubikey instead of regular password, use "sufficient".
-
-          Read
-          <citerefentry>
-            <refentrytitle>pam.conf</refentrytitle>
-            <manvolnum>5</manvolnum>
-          </citerefentry>
-          for better understanding of this option.
-        '';
-      };
-      id = mkOption {
-        example = "42";
-        type = types.str;
-        description = "client id";
-      };
-
-      debug = mkOption {
-        default = false;
-        type = types.bool;
-        description = ''
-          Debug output to stderr.
-        '';
-      };
-      mode = mkOption {
-        default = "client";
-        type = types.enum [ "client" "challenge-response" ];
-        description = ''
-          Mode of operation.
-
-          Use "client" for online validation with a YubiKey validation service such as
-          the YubiCloud.
-
-          Use "challenge-response" for offline validation using YubiKeys with HMAC-SHA-1
-          Challenge-Response configurations. See the man-page ykpamcfg(1) for further
-          details on how to configure offline Challenge-Response validation.
-
-          More information can be found <link
-          xlink:href="https://developers.yubico.com/yubico-pam/Authentication_Using_Challenge-Response.html">here</link>.
-        '';
-      };
-    };
-
-    security.pam.enableEcryptfs = mkEnableOption "eCryptfs PAM module (mounting ecryptfs home directory on login)";
-
-    users.motd = mkOption {
-      default = null;
-      example = "Today is Sweetmorn, the 4th day of The Aftermath in the YOLD 3178.";
-      type = types.nullOr types.lines;
-      description = "Message of the day shown to users when they log in.";
-    };
-
-  };
-
-
-  ###### implementation
-
-  config = {
-
-    environment.systemPackages =
-      # Include the PAM modules in the system path mostly for the manpages.
-      [ pkgs.pam ]
-      ++ optional config.users.ldap.enable pam_ldap
-      ++ optional config.services.sssd.enable pkgs.sssd
-      ++ optionals config.krb5.enable [pam_krb5 pam_ccreds]
-      ++ optionals config.security.pam.enableOTPW [ pkgs.otpw ]
-      ++ optionals config.security.pam.oath.enable [ pkgs.oathToolkit ]
-      ++ optionals config.security.pam.p11.enable [ pam_p11 ]
-      ++ optionals config.security.pam.u2f.enable [ pkgs.pam_u2f ];
-
-    boot.supportedFilesystems = optionals config.security.pam.enableEcryptfs [ "ecryptfs" ];
-
-    security.wrappers = {
-      unix_chkpwd = {
-        source = "${pkgs.pam}/sbin/unix_chkpwd.orig";
-        owner = "root";
-        setuid = true;
-      };
-    };
-
-    environment.etc = mapAttrs' makePAMService config.security.pam.services;
-
-    security.pam.services =
-      { other.text =
-          ''
-            auth     required pam_warn.so
-            auth     required pam_deny.so
-            account  required pam_warn.so
-            account  required pam_deny.so
-            password required pam_warn.so
-            password required pam_deny.so
-            session  required pam_warn.so
-            session  required pam_deny.so
-          '';
-
-        # Most of these should be moved to specific modules.
-        i3lock = {};
-        i3lock-color = {};
-        vlock = {};
-        xlock = {};
-        xscreensaver = {};
-
-        runuser = { rootOK = true; unixAuth = false; setEnvironment = false; };
-
-        /* FIXME: should runuser -l start a systemd session? Currently
-           it complains "Cannot create session: Already running in a
-           session". */
-        runuser-l = { rootOK = true; unixAuth = false; };
-      };
-
-  };
-
-}
--- a/nixops/pam_p11/pam_p11.nix
+++ b/nixops/pam_p11/pam_p11.nix
@ -1,23 +0,0 @@
-{ stdenv, fetchFromGitHub, autoreconfHook, pkg-config, openssl, libp11, pam }:
-
-stdenv.mkDerivation rec {
-  pname = "pam_p11";
-  version = "0.3.1";
-
-  src = fetchFromGitHub {
-    owner = "OpenSC";
-    repo = "pam_p11";
-    rev = "pam_p11-${version}";
-    sha256 = "1caidy18rq5zk82d51x8vwidmkhwmanf3qm25x1yrdlbhxv6m7lk";
-  };
-
-  patchPhase =
-    ''
-    substituteInPlace src/match_openssh.c --replace \
-      '"%s/.ssh/authorized_keys", pw->pw_dir)' \
-      '"/etc/ssh/authorized_keys.d/%s", pw->pw_name)'
-    '';
-
-  nativeBuildInputs = [ autoreconfHook pkg-config ];
-  buildInputs = [ pam openssl libp11 ];
-}
--- a/nixops/rpi.nix
+++ b/nixops/rpi.nix
@ -1,63 +0,0 @@
-{ host, rpi4 }:
-
-{ 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;
-  nixpkgs.system = "aarch64-linux";
-
-  boot.loader.grub.enable = false;
-
-  boot.loader.generic-extlinux-compatible.enable = !rpi4;
-  boot.loader.raspberryPi = pkgs.lib.mkIf rpi4 {
-    enable = true;
-    version = 4;
-  };
-  boot.kernelPackages = pkgs.lib.mkIf rpi4 pkgs.linuxPackages_latest;
-
-  fileSystems = if rpi4 then {
-    "/boot" = {
-      device = "/dev/disk/by-label/FIRMWARE";
-      fsType = "vfat";
-    };
-    "/" = {
-      device = "/dev/disk/by-label/NIXOS_SD";
-      fsType = "ext4";
-    };
-  } else {
-    "/" = {
-      device = "/dev/disk/by-label/NIXOS_SD";
-      fsType = "ext4";
-    };
-  };
-
-  services.openssh.enable = true;
-  services.openssh.passwordAuthentication = false;
-
-  networking.hostName = host;
-  time.timeZone = "Asia/Hong_Kong";
-
-  users.extraGroups.plugdev = { };
-  users.mutableUsers = false;
-  users.defaultUserShell = pkgs.fish;
-  users.extraUsers = (import ./common-users.nix { inherit pkgs; }) // {
-    nix = {
-      isNormalUser = true;
-    };
-  };
-  security.sudo.wheelNeedsPassword = false;
-  services.udev.packages = [ m-labs.openocd ];
-
-  documentation.enable = false;
-  environment.systemPackages = with pkgs; [
-    psmisc wget vim git usbutils lm_sensors file telnet mosh tmux xc3sprog m-labs.openocd screen gdb minicom picocom
-  ];
-  programs.fish.enable = true;
-  programs.wireshark.enable = true;
-
-  nix.binaryCachePublicKeys = ["nixbld.m-labs.hk-1:5aSRVA5b320xbNvu30tqxVPXpld73bhtOeH6uAjRyHc="];
-  nix.binaryCaches = ["https://cache.nixos.org" "https://nixbld.m-labs.hk"];
-  nix.trustedUsers = ["root" "nix"];
-}
--- a/nixops/zeus-hardware-configuration.nix
+++ b/nixops/zeus-hardware-configuration.nix
@ -1,33 +0,0 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
-{ config, lib, pkgs, ... }:
-
-{
-  imports =
-    [ <nixpkgs/nixos/modules/installer/scan/not-detected.nix>
-    ];
-
-  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usbhid" "usb_storage" "sd_mod" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/890b20a2-08d5-4635-b3a7-003ad4a11a19";
-      fsType = "ext4";
-    };
-
-  fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/91B4-E546";
-      fsType = "vfat";
-    };
-
-  swapDevices = [ ];
-
-  nix.maxJobs = lib.mkDefault 16;
-  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
-
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
-}