anchor.diff:  { lib
   , buildPythonPackage
   , fetchFromGitHub
  -, six
  -, pytest
   , mock
   , parameterized
  +, pyelftools
  +, pytestCheckHook
   , pythonOlder
  +, six
   }:
   
   buildPythonPackage rec {
  
positive.code:   ];
  
    checkInputs = [
      pytest
      mock
      parameterized
    ];
  
    checkPhase = ''
      export PATH=$out/bin:$PATH
      pytest tests/functional -k 'not can_invoke_pip'
    '';
  
    meta = with lib; {
      homepage = "https://github.com/awslabs/aws-lambda-builders";
      description = "A tool to compile, build and package AWS Lambda functions";
      longDescription = ''
        Lambda Builders is a Python library to compile, build and package
        AWS Lambda functions for several runtimes & frameworks.
  
negative.code:     owner = "awslabs";
      repo = "aws-lambda-builders";
      rev = "refs/tags/v${version}";
      hash = "sha256-EkAtRqUHwmH0LG/bkXBbZ3TMgXDtcqLfUBySPbrgWmc=";
    };
  
    propagatedBuildInputs = [
  