anchor.diff:  { lib
   , fetchFromGitHub
   , buildPythonPackage
  -, poetry
  +, poetry-core
   , docopt-ng
   , easywatch
   , jinja2
   , pytestCheckHook
   , pytest-check
  +, pythonOlder
   , markdown
   , testVersion
  +, tomlkit
   , staticjinja
   }:
   
  
positive.code:   };
  
    nativeBuildInputs = [
      poetry
    ];
  
    propagatedBuildInputs = [
  
negative.code:     pytestCheckHook
      pytest-check
      markdown
      tomlkit
    ];
  
    # The tests need to find and call the installed staticjinja executable
  