anchor.diff:  
     go-zookeeper = buildFromGitHub {
       version = 2;
  -    rev = "87e1bca4477a3cc767ca71be023ced183d74e538";
  -    date = "2016-09-02";
  +    rev = "1d7be4effb13d2d908342d349d71a284a7542693";
  +    date = "2016-10-28";
       owner  = "samuel";
       repo   = "go-zookeeper";
  -    sha256 = "0hid8806vlg1f3v88isi96x425nw2jw2vgpmmihpyzqya0qsxkh7";
  +    sha256 = "15jwlcscvqpj6yfsjmi7735q45zn5pv1h0by3dzggfry6y0h44fs";
     };
   
     gorequest = buildFromGitHub {
  
positive.code: 
    lego = buildFromGitHub {
      version = 2;
      rev = "4bb8bea031eb805f361c04ca222f266b9e7feced";
      owner = "xenolf";
      repo = "lego";
      sha256 = "0hr94ndpgl8qv75sqi4jm18fj96w9x3cgar27c1w3rllna0mv85a";
  
      buildInputs = [
        auroradnsclient
  
negative.code: 
    crypto = buildFromGitHub {
      version = 2;
      rev = "b2fa06b6af4b7c9bfeb8569ab7b17f04550717bf";
      date = "2016-10-28";
      owner    = "golang";
      repo     = "crypto";
      sha256 = "0qisvblq8c0igyck5vqzwdkmvki898w4yb4ma06yslxj0awxv7fy";
      goPackagePath = "golang.org/x/crypto";
      goPackageAliases = [
        "code.google.com/p/go.crypto"
  