{ config, lib, pkgs, ... }: with lib; let cfg = config.services.hdapsd; hdapsd = [ pkgs.hdapsd ]; in { options = { services.hdapsd.enable = mkEnableOption '' Hard Drive Active Protection System Daemon, devices are detected and managed automatically by udev and systemd ''; }; config = mkIf cfg.enable { boot.kernelModules = [ "hdapsd" ]; services.udev.packages = hdapsd; systemd.packages = hdapsd; }; }