anchor.diff:        ${lib.optionalString (panelSize != null) ("--panel-size " + panelSize)} \
         --dest $out/share/themes
   
  +    jdupes --link-soft --recurse $out/share
  +
       runHook postInstall
     '';
   
  
positive.code: , glib
  , gnome-shell
  , gnome-themes-extra
  , libxml2
  , sassc
  , util-linux
  
negative.code:   nativeBuildInputs = [
      glib
      gnome-shell
      jdupes
      libxml2
      sassc
      util-linux
  