gst-libav-dev.tcz
   gst-libav.tcz
      gst-plugins-base.tcz
         gstreamer.tcz
            glib2.tcz
               libffi.tcz
         liborc.tcz
   gst-plugins-base-dev.tcz
      gst-plugins-base.tcz
         gstreamer.tcz
            glib2.tcz
               libffi.tcz
         liborc.tcz
      gstreamer-dev.tcz
         gstreamer.tcz
            glib2.tcz
               libffi.tcz
         glib2-dev.tcz
            glib2.tcz
               libffi.tcz
            libffi-dev.tcz
            perl5.tcz
      liborc-dev.tcz
         liborc.tcz