Add notification to copy

pkgs/default.nix

@@ -38,11 +38,12 @@ self: super:
   copy = super.writeScriptBin "copy" ''
     function clean() {
       sleep 10
-      echo cleaning
+      ${super.libnotify}/bin/notify-send -u low 'Clipboard cleaned'
       ${super.xclip}/bin/xclip -sel clipboard -i /dev/null
     }
 
     ${super.xclip}/bin/xclip -sel clipboard < /dev/stdin
+    ${super.libnotify}/bin/notify-send -u low -t 10000 'Clipboard set'
 
     clean &
   '';