libcanberra-dev.tcz
   libcanberra.tcz
      libltdl.tcz
      libvorbis.tcz
         libogg.tcz
   libtool-dev.tcz
      libtool.tcz
         libltdl.tcz
   libvorbis-dev.tcz
      libvorbis.tcz
         libogg.tcz
      libogg-dev.tcz
         libogg.tcz