anchor.diff:    };
   
     groupcache = buildFromGitHub {
  -    date = "2016-02-11";
  -    rev = "4eab30f13db9d8b25c752e99d1583628ac2fa422";
  +    date = "2016-05-15";
  +    rev = "02826c3e79038b59d737d3b1c0a1d937f71a4433";
       owner  = "golang";
       repo   = "groupcache";
  -    sha256 = "0i72yji981w22sk62hxd228rs13ym3zziqm3bq89xw21mdda5gj2";
  +    sha256 = "093p9jiid2c03d02g8fada7bl05244caddd7qjmjs0ggsrardc46";
       buildInputs = [ protobuf ];
     };
   
     grpc = buildFromGitHub {
  -    rev = "b062a3c003c22bfef58fa99d689e6a892b408f9d";
  -    date = "2016-04-25";
  +    rev = "b0b7afa173ab8030774fdf383cac027c3c5077d2";
  +    date = "2016-05-17";
       owner = "grpc";
       repo = "grpc-go";
  -    sha256 = "0ksc8rrzss5q5lk4a778i824l530d4pj1l8jwb74x4pwcisng4y4";
  +    sha256 = "01vmparkz8sjplwc7prbgiwdrvavdn618g4gw5gw61k6094pdx20";
       goPackagePath = "google.golang.org/grpc";
       goPackageAliases = [ "github.com/grpc/grpc-go" ];
       propagatedBuildInputs = [ http2 net protobuf oauth2 glog ];
  
positive.code:   };
  
    netlink = buildFromGitHub {
      rev = "f9bc7a684edbe780a09b87689db6cb1706bf327f";
      owner  = "vishvananda";
      repo   = "netlink";
      sha256 = "19bih3rr9ah74givggjd1n72nmhazl9yl7zz5ad0kd5hvkhh2lic";
      date = "2016-05-13";
      propagatedBuildInputs = [
        netns
      ];
  
negative.code:     goPackagePath = "gopkg.in/yaml.v2";
    };
  
    yaml-v1 = buildFromGitHub {
      rev = "9f9df34309c04878acc86042b16630b0f696e1de";
      date = "2014-09-24";
      owner = "go-yaml";
      repo = "yaml";
      sha256 = "128xs9pdz042hxl28fi2gdrz5ny0h34xzkxk5rxi9mb5mq46w8ys";
      goPackagePath = "gopkg.in/yaml.v1";
    };
  
    yamux = buildFromGitHub {
      date = "2016-04-20";
      rev = "c8a8a076e0858546ae6e2ee189d94e78b9b881ce";
  