{
  lib,
  buildPythonPackage,
  fetchPypi,

  pythonOlder,

  # build
  poetry-core,

  # runtime
  graphql-core,
  typing-extensions,

  # tests
  pytest-asyncio,
  pytest-describe,
  pytestCheckHook,
}:

buildPythonPackage rec {
  pname = "graphql-relay";
  version = "3.2.0";
  format = "pyproject";

  src = fetchPypi {
    inherit pname version;
    hash = "sha256-H/HFEpg1bkgaC+AJzN/ySYMs5T8wVZwTOPIqDg0XJQw=";
  };

  # This project doesn't seem to actually need setuptools. To find out why it
  # specifies it, follow up in:
  #
  #   https://github.com/graphql-python/graphql-relay-py/issues/49
  #
  postPatch = ''
    substituteInPlace pyproject.toml \
      --replace ', "setuptools>=59,<70"' ""
  '';

  nativeBuildInputs = [ poetry-core ];

  propagatedBuildInputs = [ graphql-core ] ++ lib.optionals (pythonOlder "3.8") [ typing-extensions ];

  nativeCheckInputs = [
    pytest-asyncio
    pytest-describe
    pytestCheckHook
  ];

  pythonImportsCheck = [ "graphql_relay" ];

  meta = with lib; {
    description = "Library to help construct a graphql-py server supporting react-relay";
    homepage = "https://github.com/graphql-python/graphql-relay-py/";
    license = licenses.mit;
    maintainers = [ ];
  };
}