anchor.diff:    };
   
     crypto = buildFromGitHub {
  -    rev = "6025851c7c2bf210daf74d22300c699b16541847";
  -    date = "2016-03-12";
  +    rev = "c197bcf24cde29d3f73c7b4ac6fd41f4384e8af6";
  +    date = "2016-03-17";
       owner    = "golang";
       repo     = "crypto";
  -    sha256 = "17ckkizvb0y6bfrqks9p37q9jny68zzkb73wdgvg3w4zswvyn4gz";
  +    sha256 = "1y2bbghi594m8p4pcm9pwrzql06179xj6zvhaghwcc6y0l48rbgp";
       goPackagePath = "golang.org/x/crypto";
       goPackageAliases = [
         "code.google.com/p/go.crypto"
  
positive.code:   };
  
    net = buildFromGitHub {
      rev = "35b06af0720201bc2f326773a80767387544f8c4";
      date = "2016-03-15";
      owner  = "golang";
      repo   = "net";
      sha256 = "0kqmwd6kla6rhwgyj8gic0s46bdj1qqbhb09h2hif9ai7jdiz8jj";
      goPackagePath = "golang.org/x/net";
      goPackageAliases = [
        "code.google.com/p/go.net"
  
negative.code: 
  
    protobuf = buildFromGitHub {
      rev = "8d92cf5fc15a4382f8964b08e1f42a75c0591aa3";
      date = "2016-03-19";
      owner = "golang";
      repo = "protobuf";
      sha256 = "17vzyxc2nqz8a7wjvrdcpw9hhsys3iglwp8j4dl7nmw3s6fnz3jf";
      goPackagePath = "github.com/golang/protobuf";
      goPackageAliases = [ "code.google.com/p/goprotobuf" ];
    };
  