dbus-glib-dev.tcz
   dbus-glib.tcz
      dbus.tcz
         expat2.tcz
      glib2.tcz
         libffi.tcz
   dbus-dev.tcz
      dbus.tcz
         expat2.tcz
      expat2-dev.tcz
         expat2.tcz
   glib2-dev.tcz
      glib2.tcz
         libffi.tcz
      libffi-dev.tcz