anchor.diff:  
     gocql = buildFromGitHub {
       version = 3;
  -    rev = "00a4bbccd77eaa1e28dd06bbc527b4b4a0c53728";
  +    rev = "3e8b36f5e9e52cdeb265f385808c504a53db55fc";
       owner  = "gocql";
       repo   = "gocql";
  -    sha256 = "1hilhsibph2ih2b6240ihdgx9g9aavgdhlbdb2c478cz41w391cw";
  +    sha256 = "1dwd4l728r7g7ra6n2wchibw9i2g3j3b3fqwq7rjr6bffi5sjhkb";
       propagatedBuildInputs = [
         inf_v0
         snappy
         hailocab_go-hostpool
         net
       ];
  -    date = "2017-05-22";
  +    date = "2017-05-31";
     };
   
     gofuzz = buildFromGitHub {
  
positive.code:   };
  
    go-ole = buildFromGitHub {
      version = 2;
      date = "2017-02-09";
      rev = "de8695c8edbf8236f30d6e1376e20b198a028d42";
      owner  = "go-ole";
      repo   = "go-ole";
      sha256 = "127k5hw9ghsqwqfnxirlzf7zvzgb13g1x41654bg533857j2491p";
      excludedPackages = "example";
    };
  
  
negative.code: 
    armon_go-metrics = buildFromGitHub {
      version = 3;
      date = "2017-06-01";
      rev = "f036747b9d0e8590f175a5d654a2194a7d9df4b5";
      owner = "armon";
      repo = "go-metrics";
      sha256 = "0mn4my07a5zyp8sdy3f22dm8gm0zkxy1583rml4alzjf9wyx1xza";
      propagatedBuildInputs = [
        circonus-gometrics
        datadog-go
  