{pkgs, lib, ...}: { nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ "steam" "steam-original" "steam-run" ]; 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 }; environment.systemPackages = [ pkgs.steam-run ]; }