{stdenv, fetchurl}: stdenv.mkDerivation {
  name = "zip-2.31";
  builder = ./builder.sh;
  src = fetchurl {
    url = http://ftp.info-zip.org/pub/infozip/src/zip231.tar.gz;
    md5 = "6bfc076664416251d7624ab3538d1cb9";
  };
}