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
  buildNixOS = opts: let full = (nixos opts); in {
    system = full.system;
    vm = full.vm;
  };
  buildHaskellApp = import ./Com/Simatime/buildHaskellApp.nix nixpkgs;
  nixos-mailserver = builtins.fetchTarball {
    url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/v2.2.1/nixos-mailserver-v2.2.1.tar.gz";
    sha256 = "03d49v8qnid9g9rha0wg2z6vic06mhp0b049s3whccn1axvs2zzx";
  };
in {
  Com.Simatime = buildNixOS {
    system = "x86_64-linux";
    configuration = {
      imports = [
        ./Com/Simatime/hardware.nix
        ./Com/Simatime/networking.nix
        # common infra
        ./Com/Simatime/users.nix
        ./Com/Simatime/packages.nix
        # configured modules
        ./Com/Simatime/git.nix
        ./Com/Simatime/mail.nix
        ./Com/Simatime/web.nix
        ./Com/Simatime/znc.nix
        # third party
        nixos-mailserver
      ];
      # TODO(bsima): move more stuff here to a common module
      nixpkgs.config.allowUnfree = true;
      programs.mosh = {
        enable = true;
        withUtempter = true;
      };
      services.openssh = {
        enable = true;
        passwordAuthentication = false;
      };
      security.sudo.wheelNeedsPassword = true;
      boot.cleanTmpDir = true;
    };
  } // {
    dev = buildNixOS {
      system = "x86_64-linux";
      configuration = {
        imports = [
          ./Com/Simatime/users.nix
          ./Com/Simatime/packages.nix
          ./Com/Simatime/dev/hardware.nix
          ./Com/Simatime/dev/configuration.nix
        ];
      };
    };
  };
  Com.InfluencedByBooks = buildNixOS {
    system = "x86_64-linux";
    configuration = {
      imports = [
        ./Com/InfluencedByBooks/service.nix
        # common infra
        ./Com/Simatime/users.nix
        ./Com/Simatime/packages.nix
      ];
      nixpkgs.config.allowUnfree = true;
      services.openssh = {
        enable = true;
        passwordAuthentication = false;
      };
      security.sudo.wheelNeedsPassword = true;
      boot.cleanTmpDir = true;
    };
  } // (buildHaskellApp {
    name = "Com.InfluencedByBooks";
    nick = "ibb";
    apex = "Com.InfluencedByBooks.Apex";
    aero = "Com.InfluencedByBooks.Aero";
    deps = {
      both = [
        "clay"
        "miso"
        "protolude"
        "servant"
        "text"
      ];
      apex = [
        "MonadRandom"
        "acid-state"
        "blaze-html"
        "blaze-markup"
        "bytestring"
        "ixset"
        "random"
        "safecopy"
        "scotty"
        "servant-server"
        "text"
      ];
      aero = [
        "aeson"
        "containers"
        "ghcjs-base"
      ];
    };
  });
}