{ config, lib, pkgs, ... }: let cfg = config.programs.calls; in { options = { programs.calls = { enable = lib.mkEnableOption '' GNOME calls: a phone dialer and call handler ''; }; }; config = lib.mkIf cfg.enable { programs.dconf.enable = true; environment.systemPackages = [ pkgs.calls ]; services.dbus.packages = [ pkgs.callaudiod ]; }; }