{
  lib,
  ...
}:

{
  nix = {
    settings = {
      warn-dirty = false;
      experimental-features = [
        "nix-command"
        "flakes"
      ];
      auto-optimise-store = true;
      substituters = [ "https://nix-gaming.cachix.org" ];
      trusted-public-keys = [
        "nix-gaming.cachix.org-1:nbjlureqMbRAxR1gJ/f3hxemL9svXaZF/Ees8vCUUs4="
      ];
    };
  };

  programs = {
    steam = {
      enable = true;
      extest.enable = true;
      remotePlay.openFirewall = true;
      dedicatedServer.openFirewall = true;
      localNetworkGameTransfers.openFirewall = true;
    };
  };

  hardware.steam-hardware.enable = true;

  nixpkgs.config.allowUnfree = true;
  nixpkgs.config.allowUnfreePredicate =
    pkg:
    builtins.elem (lib.getName pkg) [
      "steam"
      "steam-original"
      "steam-unwrapped"
      "steam-run"
    ];
}