xscreensaver.tcz
   libglade.tcz
      gtk2.tcz
         atk.tcz 
         pango.tcz 
         gdk-pixbuf2.tcz 
         shared-mime-info.tcz
            glib2.tcz
               libffi.tcz
               pcre.tcz
            libxml2.tcz
               liblzma.tcz
         Xorg-7.7-lib.tcz