let
  nixpkgs = <nixpkgs>;
  pkgs = import nixpkgs {};
  cluster = (import ./cluster.nix);

  configuration = { config, pkgs, lib, ... }: with lib; {
    imports = [
        "${nixpkgs}/nixos/modules/installer/netboot/netboot-minimal.nix"
    ];
    systemd.services.sshd.wantedBy = mkOverride 0 [ "multi-user.target" ];
    networking.hostName = "";

    users.users.root = {
       openssh.authorizedKeys.keys = cluster.keys;
       initialPassword = "root";
    };

    virtualisation.docker.enable = true;

    i18n.consoleKeyMap = "de";
 
    environment.systemPackages = with pkgs; [
      (import ./bin/tw_cli.nix)
    ];
  };

  nixos = import "${nixpkgs}/nixos" {
    inherit configuration;
    # system = ...;
  };
in
  pkgs.symlinkJoin {
    name = "netboot";
    paths = with nixos.config.system.build; [
      netbootRamdisk
      kernel
      netbootIpxeScript
    ];
    preferLocalBuild = true;
  }