{ lib, pkgs, config, ... }: { options = { steam.enable = lib.mkEnableOption ""; }; config = lib.mkIf config.steam.enable { programs.steam.enable = true; nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ "steam-original" "steam" "steam-run" "steam-unwrapped" ]; environment.systemPackages = with pkgs; [ mangohud lutris-free ]; }; }