anchor.diff:  
     gocql = buildFromGitHub {
       version = 2;
  -    rev = "66628b367ca6d68ca135881f4d947bdf20d915b9";
  +    rev = "7e9748ccda7fd5135a7db13ba03f09cad0c86bed";
       owner  = "gocql";
       repo   = "gocql";
  -    sha256 = "1bsm48dpzfrqva7b25naiw4blachy13w6lqmnxqns0zgf6l81dp0";
  +    sha256 = "1kq9yxqc1jij8s44fln2nsbfjnbkmsbvjc6rk0d281b56dv8wgpk";
       propagatedBuildInputs = [
         inf_v0
         snappy
         hailocab_go-hostpool
         net
       ];
  -    date = "2017-04-11";
  +    date = "2017-04-19";
     };
   
     gojsonpointer = buildFromGitHub {
  
positive.code: 
    goutils = buildFromGitHub {
      version = 2;
      rev = "8220d1bdf8df66488e5e3ca876b0d426d8f16bc6";
      date = "2017-03-31";
      owner = "couchbase";
      repo = "goutils";
      sha256 = "0gc2543m6j7ab0a685fd3xcaww15qzympksnws2svm0n63xl5n3a";
      buildInputs = [
        cbauth
        go-couchbase
  
negative.code: 
    go-cache = buildFromGitHub {
      version = 2;
      rev = "7ac151875ffb48b9f3ccce9ea20f020b0c1596c8";
      owner = "patrickmn";
      repo = "go-cache";
      sha256 = "0cxfikqd2wn1q004zlcky4kjrm5kkgs3hcj8xh32y7xqysj6pnx2";
      date = "2017-04-18";
    };
    go-checkpoint = buildFromGitHub {
      version = 1;
  