anchor.diff:  
     vault = buildFromGitHub {
       version = 3;
  -    rev = "v0.7.2";
  +    rev = "v0.7.3";
       owner = "hashicorp";
       repo = "vault";
  -    sha256 = "047w4hyk2njc2dfqj8gpq77xj3zh1pkmn1bbm372xrry5sh8sif6";
  +    sha256 = "1rj5bgiyg69bswpj0cmir4pk81xzyn4famqffgfgq01c4vf68xh8";
   
       nativeBuildInputs = [
         pkgs.protobuf-cpp
  
positive.code: 
    binding = buildFromGitHub {
      version = 3;
      date = "2017-05-21";
      rev = "1513c901915731e941815f60ede6a9c21c69a550";
      owner = "go-macaron";
      repo = "binding";
      sha256 = "1l193ynh23qy2vz5d3l2qz6bj5g1s2w8w140zkm3vb3qlfcwcwwv";
      buildInputs = [
        com
        compress
  
negative.code:       inherit
          goPackagePath
          rev;
        date = "2017-06-09";
      };
      rev = "324744a33f1f37e63dd1695cfb3ec9a3e4a1cb05";
      goPackagePath = "google.golang.org/api";
      src = fetchzip {
        version = 3;
  