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