anchor.diff:      version = 3;
       owner = "gohugoio";
       repo = "hugo";
  -    rev = "v0.24";
  -    sha256 = "05j3507164n0g6l9hv7rqamkya4jkf4dhkfiiqd8dsyj7qjc8qip";
  +    rev = "v0.24.1";
  +    sha256 = "06v56zfrgmmv0ysjcmbqqbgcj0hx1qyq53lsmdz7rjrx1kjc5mf7";
       buildInputs = [
         ace
         afero
  
positive.code: 
    docker_cli = buildFromGitHub {
      version = 3;
      date = "2017-06-23";
      rev = "8b6196ded7d610bfec0c2fea0cb1ff6df5f6cbf8";
      owner = "docker";
      repo = "cli";
      sha256 = "1c40hw46knqkkqbilg2a874pbcnb6y62jr5vqm36nakj99cbyidf";
      subPackages = [
        "cli/config/configfile"
        "opts"
  
negative.code: 
    sys = buildFromGitHub {
      version = 3;
      rev = "f7928cfef4d09d1b080aa2b6fd3ca9ba1567c733";
      date = "2017-06-27";
      owner  = "golang";
      repo   = "sys";
      sha256 = "0rca37y5dklljmvjpa7fjh5np8c1x58m5w9snxf74d7nzk0g1x06";
      goPackagePath = "golang.org/x/sys";
    };
  
  