machine-config/bert/services/factorio.nix

{pkgs, lib, ...}: {
  nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
    "factorio-headless"
  ];
  services.factorio = {
    enable = true;
    package = (import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/2c7baaaae909d8d7a50fc33beb593cde9d40e2ce.tar.gz") {
      config.allowUnfree = true;
    }).factorio-headless;
    openFirewall = true;
    nonBlockingSaving = true;
    game-name = "Chandler's Factorio Server";
    description = "Job 28:2";
  };
}