anchor.diff:    '';
   
     meta = {
  -    description      = "Lightning-fast cluster computing";
  +    description      = "Apache Spark is a fast and general engine for large-scale data processing";
       homepage         = "http://spark.apache.org";
       license          = stdenv.lib.licenses.asl20;
       platforms        = stdenv.lib.platforms.all;
  
positive.code:   };
  
    buildInputs = [ makeWrapper jre pythonPackages.python pythonPackages.numpy ]
      ++ optional mesosSupport mesos;
  
    untarDir = "${name}-bin-${hadoopVersion}";
  
negative.code: { stdenv, fetchzip, makeWrapper, jre, pythonPackages
  , RSupport? true, R
  , mesosSupport ? true, mesos
  , version
  }:
  