anchor.diff:  
     gocql = buildFromGitHub {
       version = 3;
  -    rev = "ca7d33956650d92d29e6db7fe901e23d0f0e3359";
  +    rev = "da4a50306e7bb46de0d077d7ac78c297de9aaac4";
       owner  = "gocql";
       repo   = "gocql";
  -    sha256 = "1i6mcfd57g98v3fp8ba03rgh804wq258y18czl9mnwcvqba0rqd4";
  +    sha256 = "15h3h701cxcdjkvq09h36rmxi6dcmyj6icv2lr2i3i6718cv67x4";
       propagatedBuildInputs = [
         inf_v0
         snappy
         hailocab_go-hostpool
         net
       ];
  -    date = "2017-06-15";
  +    date = "2017-06-25";
     };
   
     gofuzz = buildFromGitHub {
  
positive.code: 
    go-ethereum = buildFromGitHub {
      version = 3;
      date = "2017-06-23";
      rev = "78c04c920d07e65864f781fb5c6e5d77435d7aa0";
      owner  = "ethereum";
      repo   = "go-ethereum";
      sha256 = "1z72wclhn9w2j0kp05f1vs9a95d8scvrk49bwwv51agwk14d0qry";
      subPackages = [
        "crypto/sha3"
      ];
  
negative.code:   };
  
    crypt = buildFromGitHub {
      version = 3;
      owner = "xordataexchange";
      repo = "crypt";
      rev = "b2862e3d0a775f18c7cfe02273500ae307b61218";
      date = "2017-06-26";
      sha256 = "0jng0cymgbyl1mwiqr8cq2zkhycf0m2jwiwpqnps911faqdgk9fh";
      propagatedBuildInputs = [
        consul_api
        crypto
        etcd_client
      ];
      postPatch = ''
        sed -i backend/consul/consul.go \
  