anchor.diff:        purgeTimestamps = true;
         inherit name;
         url = "https://code.googlesource.com/google-api-go-client/+archive/${rev}.tar.gz";
  -      sha256 = "1gjm84ajw1bcq309jf96id4ahqi0vdqwsx9a8kn5m32ai1dbby3m";
  +      sha256 = "1s923qiglf343lyrr383156asfj671q9qza9lwi013fx8nkbzfch";
       };
       buildInputs = [
         appengine
  
positive.code:   };
  
    reflectwalk = buildFromGitHub {
      version = 2;
      date = "2017-01-10";
      rev = "417edcfd99a4d472c262e58f22b4bfe97580f03e";
      owner  = "mitchellh";
      repo   = "reflectwalk";
      sha256 = "0kcig5x8bv7hzzyy67g0wsm8akbl6kn8l6r0sdy1yc7jybsnbizq";
    };
  
    resumable = buildFromGitHub {
  
negative.code:       net
        sys
      ];
      date = "2017-05-08";
    };
  
    google-cloud-go = buildFromGitHub {
      version = 3;
      date = "2017-05-08";
      rev = "b1538c424762057a3044fa551802efe088fdf477";
      owner = "GoogleCloudPlatform";
      repo = "google-cloud-go";
      sha256 = "00cx35cf9xk7fzf152v9x44657wi9mivv30izn0jswryfs4ndwmz";
      goPackagePath = "cloud.google.com/go";
      goPackageAliases = [
        "google.golang.org/cloud"
  