anchor.diff:  
     crypto = buildFromGitHub {
       version = 2;
  -    rev = "5f31782cfb2b6373211f8f9fbf31283fa234b570";
  +    rev = "4428aee3e5957ee2252b9c7a17460e5147363b4b";
       date = "2016-10-12";
       owner    = "golang";
       repo     = "crypto";
  -    sha256 = "0y7l93myq3w21jlxfnjh1vcv8bvhwhcl5p2sxymdbjyrj99jb200";
  +    sha256 = "0nbf417jf4vhqz00k08fx7456b71zangh9v8hrbf6a6zl9ws960k";
       goPackagePath = "golang.org/x/crypto";
       goPackageAliases = [
         "code.google.com/p/go.crypto"
  
positive.code: 
    siddontang_go = buildFromGitHub {
      version = 2;
      date = "2016-09-04";
      rev = "a30862d58df2fab27e2463adc1648ab092f8f8a0";
      owner = "siddontang";
      repo = "go";
      sha256 = "0l6cqfyvv69yc4vy24vrinishnfcymhy09nrwxj09haiz86dm7lr";
    };
  
    ugorji_go = buildFromGitHub {
  
negative.code:     version = 2;
      owner = "minio";
      repo = "sha256-simd";
      date = "2016-10-15";
      rev = "f78567f7ee70e4be482ad2849f6c3bb7651b34a5";
      sha256 = "0mb6knh4bx8p4kpaq4grcc9gw7w9kliipky30sbw1nqnrymmcsja";
    };
  
    skyring-common = buildFromGitHub {
  