rec {
   version="2.15";
   name="asymptote-2.15";
   hash="11y8w2r51g48znqvl1wwrg0wsrwz3194r70aq1mlgq1g0xzln0w9";
   url="http://downloads.sourceforge.net/project/asymptote/asymptote/${version}/asymptote-${version}.src.tgz";
   advertisedUrl="http://downloads.sourceforge.net/project/asymptote/asymptote/2.15/asymptote-2.15.src.tgz";


}