anchor.diff:  
     oauth2 = buildFromGitHub {
       version = 2;
  -    rev = "96382aa079b72d8c014eb0c50f6c223d1e6a2de0";
  -    date = "2016-12-13";
  +    rev = "314dd2c0bf3ebd592ec0d20847d27e79d0dbe8dd";
  +    date = "2016-12-14";
       owner = "golang";
       repo = "oauth2";
  -    sha256 = "0654xmh4lrvsm71d51n15i3vhv5w6x5k4x6z8qgldm3wda7ipgdm";
  +    sha256 = "1r61rmfkqv17rh848pmy49xkzdjq8pmvvn9mxxxjq520vw3kk1rg";
       goPackagePath = "golang.org/x/oauth2";
       goPackageAliases = [ "github.com/golang/oauth2" ];
       propagatedBuildInputs = [
  
positive.code:     version = 2;
      owner = "ncw";
      repo = "rclone";
      rev = "4482e75f385b1dd060d3fb8339e36196ad975987";
      sha256 = "1yyisnhlkmafyh20qidrmagjs9d6pn6h7rv1dggmdx2p5y1djawg";
      propagatedBuildInputs = [
        aws-sdk-go
        cobra
  
negative.code: 
    grpc = buildFromGitHub {
      version = 2;
      date = "2016-12-19";
      rev = "09aecb094ef6b9ebe49dd999f52c505beeeb402e";
      owner = "grpc";
      repo = "grpc-go";
      sha256 = "1h75cl54qvp3n68mpvmd9b1s80pygwabb0z40vsbj29dvxh3kjq7";
      goPackagePath = "google.golang.org/grpc";
      goPackageAliases = [
        "github.com/grpc/grpc-go"
  