anchor.diff:    };
   
     image = buildFromGitHub {
  -    rev = "8ab1ac6834edd43d91cbe24272897a87ce7e835e";
  -    date = "2015-08-23";
  +    rev = "baddd3465a05d84a6d8d3507547a91cb188c81ea";
  +    date = "2015-09-16";
       owner = "golang";
       repo = "image";
  -    sha256 = "1ckr7yh5dx2kbvp9mis7i090ss9qcz46sazrj9f2hw4jj5g3y7dr";
  +    sha256 = "0rdknh8x74ds42rdqwhix3hzm954r93xnm26qiykr7mhj9wvn098";
       goPackagePath = "golang.org/x/image";
       goPackageAliases = [ "github.com/golang/image" ];
     };
   
     net = buildFromGitHub {
  -    rev    = "62ac18b461605b4be188bbc7300e9aa2bc836cd4";
  -    date   = "2015-08-29";
  +    rev    = "d5cd7348bfebdf7dbb6dbb18fa488525f9024293";
  +    date   = "2015-12-03";
       owner  = "golang";
       repo   = "net";
  -    sha256 = "0lwwvbbwbf3yshxkfhn6z20gd45dkvnmw2ms36diiy34krgy402p";
  +    sha256 = "03d3xnjr5l3xggrsxm8w170phgyqiqajp8k3xv6j4x4ajlar3i54";
       goPackagePath = "golang.org/x/net";
       goPackageAliases = [
         "code.google.com/p/go.net"
  
positive.code:   };
  
    sys = buildFromGitHub {
      rev    = "d9157a9621b69ad1d8d77a1933590c416593f24f";
      date   = "2015-02-01";
      owner  = "golang";
      repo   = "sys";
      sha256 = "1asdbp7rj1j1m1aar1a022wpcwbml6zih6cpbxaw7b2m8v8is931";
      goPackagePath = "golang.org/x/sys";
      goPackageAliases = [
        "github.com/golang/sys"
  
negative.code:   };
  
    oauth2 = buildFromGitHub {
      rev = "2baa8a1b9338cf13d9eeb27696d761155fa480be";
      date = "2015-12-04";
      owner = "golang";
      repo = "oauth2";
      sha256 = "1b34m7k4q667vswjgr53sgg4nhn4cbnbp0yya55c2v2pr5r3qym5";
      goPackagePath = "golang.org/x/oauth2";
      goPackageAliases = [ "github.com/golang/oauth2" ];
      propagatedBuildInputs = [ net gcloud-golang-compute-metadata ];
  