{ pkgs, lib, config, ... }: { options = { apps.steam.enable = lib.mkEnableOption "Enables Steam for video games."; }; config = lib.mkIf config.apps.steam.enable { hardware.steam-hardware.enable = true; programs.steam = { enable = true; remotePlay.openFirewall = true; # Open ports in the firewall for Steam Remote Play dedicatedServer.openFirewall = true; # Open ports in the firewall for Source Dedicated Server }; }; }