libsane.tcz
   libjpeg-turbo.tcz
   libusb.tcz
      udev-lib.tcz
   libcups.tcz
      libavahi.tcz
         dbus.tcz
            expat2.tcz
         gcc_libs.tcz
         glib2.tcz
            libffi.tcz
            pcre.tcz
      openssl.tcz
   libtiff.tcz
      libjpeg-turbo.tcz