anchor.diff:  
     websocket = buildFromGitHub {
       version = 2;
  -    rev = "6257d10a8b2ac6825fa94294e088dc9890ab73d3";
  +    rev = "2aff870ef83507abb46472eae82449f7a4c464c5";
       owner  = "gorilla";
       repo   = "websocket";
  -    sha256 = "190z986wx8pz1vrdy3v51552x1agyvjb6aqf8v3cqfc453wp2zbm";
  -    date = "2016-10-25";
  +    sha256 = "1j1wwc8q1b4csl2fyv4a712ff77ln26r2clx9imzxhpcivszcv7j";
  +    date = "2016-10-27";
     };
   
     wmi = buildFromGitHub {
  
positive.code: 
    gomega = buildFromGitHub {
      version = 2;
      rev = "7e2072f716a912a29b2dfa54398faf096a9909e3";
      owner  = "onsi";
      repo   = "gomega";
      sha256 = "07s3bd2im1vhm1dhr4v9gmf67c30v470d0wc6mn0ahi44bc3mggy";
      propagatedBuildInputs = [
        protobuf
        yaml_v2
      ];
      date = "2016-10-25";
    };
  
    google-api-go-client = buildFromGitHub {
      version = 2;
      rev = "3ef9447cad8d725923ca024dab57786299cf745a";
      date = "2016-10-21";
      owner = "google";
      repo = "google-api-go-client";
      sha256 = "15mb9vwadq92g1dmgidcjqw803s8apnr18x2g2i8cdcvm6225ysm";
      goPackagePath = "google.golang.org/api";
      goPackageAliases = [
        "github.com/google/google-api-client"
  
negative.code: 
    ipfs = buildFromGitHub {
      version = 2;
      date = "2016-10-26";
      rev = "17c629d7bc17c914d77e3ad1369dc545d6b94dc1";
      owner = "ipfs";
      repo = "go-ipfs";
      sha256 = "01fj4lk9j763qclvckmxbwh5iiy1rdmijjsmifq1qi29wljq76jv";
      gxSha256 = "1a23ard88cm52gxvx5ycxfb8s4m8a5d2rvrvyp9nf9sv12mxixib";
      subPackages = [
        "cmd/ipfs"
        "cmd/ipfswatch"
  