anchor.diff:    src = fetchPyPi {
       package = "Flask-RESTful";
       inherit version;
  -    sha256 = "5795519501347e108c436b693ff9a4d7b373a3ac9069627d64e4001c05dd3407";
  +    sha256 = "f8240ec12349afe8df1db168ea7c336c4e5b0271a36982bff7394f93275f2ca9";
     };
   
     buildInputs = [
  
positive.code:     flask
      pytz
      six
    ] ++ optionals doCheck [
      blinker
      mock
      nose
      pycrypto
    ];
  
    doCheck = false;
  
    meta = with lib; {
      description = "Simple framework for creating REST APIs";
  
negative.code: , flask
  , pytz
  , six
  }:
  
  let
    version = "0.3.7";
  in
  buildPythonPackage rec {
    name = "flask-restful-${version}";
  