{ config, lib, pkgs, ... }: with lib; let cfg = config.services.xserver.windowManager.pekwm; in { ###### interface options = { services.xserver.windowManager.pekwm.enable = mkEnableOption "pekwm"; }; ###### implementation config = mkIf cfg.enable { services.xserver.windowManager.session = singleton { name = "pekwm"; start = '' ${pkgs.pekwm}/bin/pekwm & waitPID=$! ''; }; environment.systemPackages = [ pkgs.pekwm ]; }; }