gstreamer-dev.tcz
   gstreamer.tcz
      glib2.tcz
         libffi.tcz
      libxml2.tcz
         liblzma.tcz
   glib2-dev.tcz
      glib2.tcz
         libffi.tcz
      libffi-dev.tcz
   libxml2-dev.tcz
      libxml2.tcz
         liblzma.tcz
      liblzma-dev.tcz
         liblzma.tcz