anchor.diff:    };
   
     oauth2 = buildFromGitHub {
  -    rev = "397fe7649477ff2e8ced8fc0b2696f781e53745a";
  -    date = "2015-06-23";
  +    rev = "2baa8a1b9338cf13d9eeb27696d761155fa480be";
  +    date = "2015-12-04";
       owner = "golang";
       repo = "oauth2";
  -    sha256 = "0fza0l7iwh6llkq2yzqn7dxi138vab0da64lnghfj1p71fprjzn8";
  +    sha256 = "1b34m7k4q667vswjgr53sgg4nhn4cbnbp0yya55c2v2pr5r3qym5";
       goPackagePath = "golang.org/x/oauth2";
       goPackageAliases = [ "github.com/golang/oauth2" ];
       propagatedBuildInputs = [ net gcloud-golang-compute-metadata ];
  
positive.code:   };
  
    image = buildFromGitHub {
      rev = "8ab1ac6834edd43d91cbe24272897a87ce7e835e";
      date = "2015-08-23";
      owner = "golang";
      repo = "image";
      sha256 = "1ckr7yh5dx2kbvp9mis7i090ss9qcz46sazrj9f2hw4jj5g3y7dr";
      goPackagePath = "golang.org/x/image";
      goPackageAliases = [ "github.com/golang/image" ];
    };
  
    net = buildFromGitHub {
      rev    = "62ac18b461605b4be188bbc7300e9aa2bc836cd4";
      date   = "2015-08-29";
      owner  = "golang";
      repo   = "net";
      sha256 = "0lwwvbbwbf3yshxkfhn6z20gd45dkvnmw2ms36diiy34krgy402p";
      goPackagePath = "golang.org/x/net";
      goPackageAliases = [
        "code.google.com/p/go.net"
  
negative.code: 
  
    protobuf = buildFromGitHub {
      rev = "68415e7123da32b07eab49c96d2c4d6158360e9b";
      date = "2015-12-06";
      owner = "golang";
      repo = "protobuf";
      sha256 = "0gi2r9n7fbr7vz0rkvngnrc1y0bbk1zyqlph023s76w8d98ykxx2";
      goPackagePath = "github.com/golang/protobuf";
      goPackageAliases = [ "code.google.com/p/goprotobuf" ];
    };
  