qpdf-dev.tcz
   qpdf.tcz
      libjpeg-turbo.tcz
      openssl.tcz
         ca-certificates.tcz
   pcre-dev.tcz
      pcre.tcz
         bzip2-lib.tcz
         gcc_libs.tcz
      bzip2-dev.tcz
         bzip2.tcz
            bzip2-lib.tcz
      gcc_libs-dev.tcz
         gcc_libs.tcz