{ pkgs, lib, config, ... }: { options.printing = { enable = lib.mkEnableOption "enable printing"; }; config = lib.mkIf config.printing.enable { services.printing = { enable = true; drivers = with pkgs; [ gutenprint hplip splix samsung-unified-linux-driver brlaser ]; }; services.avahi = { enable = true; nssmdns4 = true; openFirewall = true; }; }; }