anchor.diff:    cfg = xcfg.desktopManager.kde4;
     xorg = pkgs.xorg;
   
  -  isKDE47 = !(pkgs.kde4 ? kdebase);
  +  isKDE47 = pkgs.kde4 ? kde_wallpapers;
   
   in
   
  
positive.code:           xorg.xmessage # so that startkde can show error messages
            xorg.xset # used by startkde, non-essential
            xorg.xauth # used by kdesu
          ]
        ) ++ config.environment.kdePackages;
  
  
negative.code:       else
          # KDE >= 4.7
          [ pkgs.kde4.kdelibs
            pkgs.kde4.kdebase # contains kde-workspace etc.
            pkgs.kde4.kde_wallpapers # contains kdm's default background
            pkgs.kde4.oxygen_icons
  
            # Phonon backends.
            pkgs.phonon_backend_gstreamer
  