{ config, lib, pkgs, ... }: with lib; let cfg = config.my.services.printing; in { options.my.services.printing = { enable = mkOption { default = false; type = types.bool; example = true; }; }; config = lib.mkIf cfg.enable { services = { printing = { enable = true; drivers = with pkgs; [ epson-escpr2 ]; }; avahi = { enable = true; nssmdns = true; }; }; }; }