anchor.diff:      version = 2;
       owner = "minio";
       repo = "miniobrowser";
  -    date = "2017-01-13";
  -    rev = "75ffc7a8fa5bb2cb2b28504deb8e005b29e51145";
  -    sha256 = "0wxnf7jkpm0mywz4vwxcby8wgzifg2jq5rij5774xlb2r0a93nqk";
  +    date = "2017-01-14";
  +    rev = "b06d3f5371ad64b30b1a7f201d3a4a6cfdb8fe49";
  +    sha256 = "1bvg31aq2k6b9vikbsnhfx7slq0ls4jx4nbk6va2vyqw377pcvvl";
       propagatedBuildInputs = [
         go-bindata-assetfs
       ];
  
positive.code: 
    tools = buildFromGitHub {
      version = 2;
      rev = "0d047c8d5a8c3a1c89d9d78511f4ed7aef49ea0c";
      date = "2016-12-22";
      owner = "golang";
      repo = "tools";
      sha256 = "13ygmpzgfli52a44nayk6mzkll8z5nq04327jkzkysd8725n9iz2";
      goPackagePath = "golang.org/x/tools";
      goPackageAliases = [ "code.google.com/p/go.tools" ];
  
  
negative.code: 
    gomega = buildFromGitHub {
      version = 2;
      rev = "e85f63af4302dc0e4277c6008ecf803f1d80e4f0";
      owner  = "onsi";
      repo   = "gomega";
      sha256 = "0hf2vm1d5hzwqsnjsibqlnf4ibcykvy8c13hf07k1jjrrrp9qgcx";
      propagatedBuildInputs = [
        protobuf
        yaml_v2
      ];
      date = "2017-01-13";
    };
  
    google-api-go-client = buildFromGitHub {
  