anchor.diff:      version = 2;
       owner = "minio";
       repo = "dsync";
  -    date = "2016-11-21";
  -    rev = "1c7e0305144281870a538dc21659c29c14dbe244";
  -    sha256 = "1580wp7gdkknspjy12wdw8725ll9hs9w31f1xhi8vrzb10izw6z6";
  +    date = "2016-11-28";
  +    rev = "dd0da3743e6668b03559c2905cc661bc0fceeae3";
  +    sha256 = "1fbw8g5pv0qnb1phdp4frwsm5rl5019jx2gnqngmm7xjlr6862s9";
     };
   
     ed25519 = buildFromGitHub {
  
positive.code: 
    go-github = buildFromGitHub {
      version = 2;
      date = "2016-11-14";
      rev = "d4f1b2d029be1730fd349ca929cc9c0da4a27007";
      owner = "google";
      repo = "go-github";
      sha256 = "1k98v835rp7gkginkv6h15w6iq9d4brlswg8vf26k814vys8q6cn";
      buildInputs = [ oauth2 ];
      propagatedBuildInputs = [ go-querystring ];
    };
  
negative.code: 
    prometheus = buildFromGitHub {
      version = 2;
      rev = "v1.4.1";
      owner  = "prometheus";
      repo   = "prometheus";
      sha256 = "0pb3h7ph2y4aihs2vqnvwx2jxp2adycs1d42caz9cggc5f8yhki4";
      buildInputs = [
        aws-sdk-go
        azure-sdk-for-go
  