anchor.diff:  
     macaron_v1 = buildFromGitHub {
       version = 2;
  -    rev = "v1.1.9";
  +    rev = "v1.1.11";
       owner  = "go-macaron";
       repo   = "macaron";
  -    sha256 = "0c1lgra8jdflql9y7dzkpbpa86965b74yx3b84vgyp97rx6lv1s7";
  +    sha256 = "1c03pdizyqn6q2c56fprmbvfg12wrd605251bfj5py96ag50i8w7";
       goPackagePath = "gopkg.in/macaron.v1";
       goPackageAliases = [
         "github.com/go-macaron/macaron"
  
positive.code: 
    columnize = buildFromGitHub {
      version = 2;
      rev = "6f43af5ecd2928c6fef2b4f35ef6f36f96690390";
      owner  = "ryanuber";
      repo   = "columnize";
      sha256 = "1qxfmnbh1y5zia4izxjv97mc56gxwfxn6g17jhjqvjx962d4lprn";
      date = "2016-09-14";
    };
  
    com = buildFromGitHub {
  
negative.code: 
    grpc = buildFromGitHub {
      version = 2;
      date = "2016-12-21";
      rev = "9d682f9293b408c42d17c587d0e2a31237ac3f10";
      owner = "grpc";
      repo = "grpc-go";
      sha256 = "0194gwp4zma14y1a50ip1h7hrjxc741w6jyqdigjia59dik6b49x";
      goPackagePath = "google.golang.org/grpc";
      goPackageAliases = [
        "github.com/grpc/grpc-go"
  