{ lib, ...}: {
  nix = {
    gc = {
      automatic = true;
      dates = "05:30";
      options = "--delete-older-than 7d";
    };
    settings = {
      keep-outputs = true;
      auto-optimise-store = true;
      experimental-features = ["nix-command" "flakes"];
      trusted-users = ["root" "@wheel"];
    };
  };

  # nixpkgs.config.allowUnfreePredicate = (pkg: builtins.elem (lib.getName pkg) [
  #   "steam"
  # ]);
}