let
  nixpkgs-tar = builtins.fetchTarball (import ./nixpkgs.nix);
  overlay = import ./overlay.nix;
  bizpkgs = import "${nixpkgs-tar}" { overlays = [ overlay ]; };
  nixos = import "${nixpkgs-tar}/nixos";
  biz = import ./biz.nix { nixpkgs = bizpkgs; };
  buildOS = import ./Com/Simatime/buildOS.nix nixos;
  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 rec {
  # Cloud infrastructure, always online. Mostly for messaging-related
  # stuff.
  #
  Com.Simatime.Cloud = buildOS {
    enableVpn = true;
    ipAddress = "159.89.128.69";
    configuration = {
      imports = [
        ./Com/Simatime/packages.nix
        ./Com/Simatime/users.nix
        ./Com/Simatime/Cloud/chat.nix
        ./Com/Simatime/Cloud/git.nix
        ./Com/Simatime/Cloud/hardware.nix
        ./Com/Simatime/Cloud/mail.nix
        ./Com/Simatime/Cloud/networking.nix
        ./Com/Simatime/Cloud/web.nix
        ./Com/Simatime/Cloud/znc.nix
        nixos-mailserver
      ];
      networking.hostName = "simatime";
      networking.domain = "simatime.com";
    };
  };
  # Dev machine for work and building stuff.
  #
  Com.Simatime.Dev = buildOS {
    enableVpn = true;
    ipAddress = "73.222.221.63";
    deps = {
      wemux = bizpkgs.wemux;
    };
    configuration = {
      imports = [
        ./Com/Simatime/packages.nix
        ./Com/Simatime/users.nix
        ./Com/Simatime/Dev/configuration.nix
        ./Com/Simatime/Dev/hardware.nix
      ];
      networking.hostName = "lithium";
      networking.domain = "dev.simatime.com";
    };
  };
  # The production server for que.run
  #
  Run.Que.Prod = buildOS {
    deps = {
      que-server = Run.Que.Server;
    };
    configuration = {
      imports = [
        ./Com/Simatime/packages.nix
        ./Com/Simatime/users.nix
        ./Run/Que/Server.nix
        ./Run/Que/Prod.nix
      ];
      networking.hostName = "prod.que.run";
      networking.domain = "que.run";
    };
  };
  # Haskell targets
  #
  Com.InfluencedByBooks.Server = biz.buildGhc Com/InfluencedByBooks/Server.hs;
  Com.InfluencedByBooks.Client = biz.buildGhcjs Com/InfluencedByBooks/Client.hs;
  Com.MusicMeetsComics.Server = biz.buildGhc Com/MusicMeetsComics/Server.hs;
  Com.MusicMeetsComics.Client = biz.buildGhcjs Com/MusicMeetsComics/Client.hs;
  Run.Que.Server = biz.buildGhc ./Run/Que/Server.hs;
  Run.Que.Website = biz.buildGhc ./Run/Que/Website.hs;
  # Development environment
  repl = biz.globalGhc;
  # Fall through to any of our overlay packages
  inherit bizpkgs;
}