anchor.diff:  
     go-couchbase = buildFromGitHub {
       version = 3;
  -    rev = "98e48116286caa5c3ba06d9bb197f94498c97e89";
  +    rev = "bb5ab95856cdeb773a5393ea869bcc71d39201e0";
       owner  = "couchbase";
       repo   = "go-couchbase";
  -    sha256 = "063wqlyqvdnwv6li1ncrx55mqys5lki61nzqlbgs6fjjf31nkl1a";
  -    date = "2017-05-19";
  +    sha256 = "1xaph189573xgmm7v8nrzhn3vwyiy9a43i54y5ishgygnbhdkci3";
  +    date = "2017-05-26";
       goPackageAliases = [
         "github.com/couchbaselabs/go-couchbase"
       ];
  
positive.code:   };
  
    dsync = buildFromGitHub {
      version = 2;
      owner = "minio";
      repo = "dsync";
      date = "2017-04-19";
      rev = "535db94aebce49cacce4de9c6f5f5821601281cd";
      sha256 = "0f3lc7yszyl3yv9rq7bsyda2yfp56xydvh834qrpplf998973yii";
    };
  
    easyjson = buildFromGitHub {
  
negative.code: 
    consul-template = buildFromGitHub {
      version = 3;
      rev = "v0.18.5";
      owner = "hashicorp";
      repo = "consul-template";
      sha256 = "1mhjb5rg413nv2vbyfanl14ag0shhilg05pvnk97m0nxmkzya4sw";
  
      propagatedBuildInputs = [
        consul_api
  