anchor.diff:        restartTriggers = [ config.environment.etc."mbpfan.conf".source ];
         serviceConfig = {
           Type = "simple";
  -        ExecStart = "${cfg.package}/bin/mbpfan -fv";
  +        ExecStart = "${cfg.package}/bin/mbpfan -f${verbose}";
           ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
           PIDFile = "/var/run/mbpfan.pid";
           Restart = "always";
  
positive.code: 
  let
    cfg = config.services.mbpfan;
  
  in {
    options.services.mbpfan = {
  
negative.code:         The polling interval.
        '';
      };
  
      verbose = mkOption {
        type = types.bool;
        default = false;
        description = ''
          If true, sets the log level to verbose.
        '';
      };
    };
  
    config = mkIf cfg.enable {
      boot.kernelModules = [ "coretemp" "applesmc" ];
  
      environment = {
        etc."mbpfan.conf".text = ''
  