anchor.diff:  
   buildPythonPackage rec {
     pname = "openapi-spec-validator";
  -  version = "0.4.0";
  +  version = "0.5.1";
     format = "pyproject";
   
     # no tests via pypi sdist
  
positive.code:   ];
  
    meta = with lib; {
      homepage = "https://github.com/p1c2u/openapi-spec-validator";
      description = "Validates OpenAPI Specs against the OpenAPI 2.0 (aka Swagger) and OpenAPI 3.0.0 specification";
      license = licenses.asl20;
      maintainers = with maintainers; [ rvl ];
    };
  
negative.code: , poetry-core
  
  # propagates
  , importlib-resources
  , jsonschema
  , jsonschema-spec
  , lazy-object-proxy
  , openapi-schema-validator
  , pyyaml
  
  