let
  nixpkgs-tar = builtins.fetchTarball (import ./nixpkgs.nix);
  nixpkgs = import "${nixpkgs-tar}" {};
  nixos = import "${nixpkgs-tar}/nixos";
  # TODO(bsima): buildNixOS should be split into multiple functions that each
  # return one thing, instead of a single function that returns multiple things
  buildOS = import ./Com/Simatime/buildOS.nix nixos;
  buildGhc = import ./Com/Simatime/buildGhc.nix nixpkgs;
  buildGhcjs = import ./Com/Simatime/buildGhcjs.nix nixpkgs;
  nixos-mailserver = let ver = "v2.3.0"; in builtins.fetchTarball {
    url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/${ver}/nixos-mailserver-${ver}.tar.gz";
    sha256 = "0lpz08qviccvpfws2nm83n7m2r8add2wvfg9bljx9yxx8107r919";
  };
in {
  Com.Simatime = buildOS {
    enableVpn = true;
    ipAddress = "159.89.128.69";
    vpnRsaPrivateKeyFile = "/etc/tinc/rsa_key.priv";
    vpnEd25519PrivateKeyFile = "/etc/tinc/ed25519_key.priv";
    configuration = {
      imports = [
        ./Com/Simatime/hardware.nix
        ./Com/Simatime/networking.nix
        ./Com/Simatime/packages.nix
        ./Com/Simatime/git.nix
        ./Com/Simatime/mail.nix
        ./Com/Simatime/web.nix
        ./Com/Simatime/znc.nix
        nixos-mailserver
      ];
      programs.mosh = {
        enable = true;
        withUtempter = true;
      };
    };
  } // {
    dev = buildOS {
      enableVpn = true;
      ipAddress = "69.181.254.154";
      vpnConnectTo = "com.simatime";
      vpnRsaPrivateKeyFile = "/etc/tinc/rsa_key.priv";
      vpnEd25519PrivateKeyFile = "/etc/tinc/ed25519_key.priv";
      configuration = {
        imports = [
          ./Com/Simatime/packages.nix
          ./Com/Simatime/dev/hardware.nix
          ./Com/Simatime/dev/configuration.nix
        ];
      };
    };
    Serval = buildOS {
      configuration = {
        imports = [
          ./Com/Simatime/packages.nix
          ./Com/RunServal/hardware.nix
          ./Com/RunServal/networking.nix
        ];
        networking.hostName = "serval.simatime.com";
        boot.enableContainers = true;
      };
    };
    Que = buildGhc {
      name = "Com.Simatime.Que";
      nick = "que";
      deps = [
        "aeson"
        "async"
        "protolude"
        "scotty"
        "servant"
        "servant-server"
        "stm"
        "unagi-chan"
        "unordered-containers"
      ];
    };
  };
  Com.InfluencedByBooks = buildOS {
    configuration = {
      imports = [
        ./Com/InfluencedByBooks/service.nix
        ./Com/Simatime/packages.nix
      ];
      nixpkgs.config.allowUnfree = true;
      boot.isContainer = true;
      networking.useDHCP = false;
    };
  } // {
    Server = buildGhc {
      name = "Com.InfluencedByBooks.Server";
      nick = "ibb";
      deps = [
        "clay"
        "miso"
        "protolude"
        "servant"
        "text"
        "MonadRandom"
        "acid-state"
        "blaze-html"
        "blaze-markup"
        "bytestring"
        "ixset"
        "random"
        "safecopy"
        "scotty"
        "servant-server"
        "text"
      ];
    };
    Client = buildGhcjs {
      name = "Com.InfluencedByBooks.Client";
      nick = "ibb";
      deps = [
        "clay"
        "miso"
        "protolude"
        "servant"
        "text"
        "aeson"
        "containers"
        "ghcjs-base"
      ];
    };
  };
  Com.MusicMeetsComics = {
    Server = buildGhc {
      name = "Com.MusicMeetsComics.Server";
      nick = "mmc";
      deps = [
        "aeson"
        "clay"
        "containers"
        "miso"
        "protolude"
        "servant"
        "split"
        "string-quote"
        "text"
        "dhall"
        "ekg"
        "fast-logger"
        "http-types"
        "katip"
        "lucid"
        "monad-logger"
        "monad-metrics"
        "mtl"
        "network-uri"
        "safe"
        "servant-lucid"
        "servant-server"
        "split"
        "wai"
        "wai-app-static"
        "wai-extra"
        "wai-middleware-metrics"
        "warp"
      ];
    };
    Client = buildGhcjs {
      name = "Com.MusicMeetsComics.Client";
      nick = "mmc";
      deps = [
        "aeson"
        "clay"
        "containers"
        "miso"
        "protolude"
        "servant"
        "split"
        "string-quote"
        "text"
        "ghcjs-base"
      ];
    };
  };

  # fallthrough to nixpkgs
  nixpkgs = nixpkgs;
}