anchor.diff:          xfwm4
           xfwm4-themes
         ] ++ optionals (!cfg.noDesktop) [
  -        xfce4-notifyd
           xfce4-panel
           xfdesktop
         ];
  
positive.code:       noDesktop = mkOption {
          type = types.bool;
          default = false;
          description = "Don't install XFCE desktop components (xfdesktop, panel and notification daemon).";
        };
  
        enableXfwm = mkOption {
  
negative.code:       parole
        ristretto
        xfce4-appfinder
        xfce4-notifyd
        xfce4-screenshooter
        xfce4-session
        xfce4-settings
  