anchor.diff:  
     net = buildFromGitHub {
       version = 2;
  -    rev = "2497afe528999a59ebf56c8b8fb6191e4dcde594";
  -    date = "2016-12-02";
  +    rev = "0ab64c594a6a5489089faa1e7b2b541110f31eb5";
  +    date = "2017-01-06";
       owner  = "golang";
       repo   = "net";
  -    sha256 = "0f03i6xd29xbvk8q7a4a29d59mm9pawpczb78wg60pdcqjnqjyzl";
  +    sha256 = "1q3fh42bfwj7bjskffrdlcwnbh4rk2lrz54719fvb3vn3wj87vpd";
       goPackagePath = "golang.org/x/net";
       goPackageAliases = [
         "github.com/hashicorp/go.net"
  
positive.code:     version = 2;
      owner = "pkg";
      repo = "sftp";
      rev = "e59687e8fa2ed36b4c997df28621fb8720ffc767";
      date = "2017-01-07";
      sha256 = "14qwzlxbih79399zyamnw0ai0b7h6rjvb3wm0knmk2hr0wmh2vjf";
      propagatedBuildInputs = [
        crypto
        errors
  
negative.code:       testify
      ];
      meta.useUnstable = true;
      date = "2017-01-12";
    };
  
    cupcake_rdb = buildFromGitHub {
  