{ lib
, stdenv
, buildPythonPackage
, fetchFromGitHub
, cython
, gcc
, click
, pytestCheckHook
, pythonOlder
}:

buildPythonPackage rec {
  pname = "primer3";
  version = "2.0.1";
  format = "setuptools";

  disabled = pythonOlder "3.7";

  src = fetchFromGitHub {
    owner = "libnano";
    repo = "primer3-py";
    rev = "refs/tags/v${version}";
    hash = "sha256-WYn88Xv7WSc67TfYCq+i05tG8aKtWLUgc6axntvLF+8=";
  };

  nativeBuildInputs = [
    cython
  ] ++ lib.optionals stdenv.isDarwin [
    gcc
  ];

  nativeCheckInputs = [
    click
    pytestCheckHook
  ];
  # We are not sure why exactly this is need. It seems `pytestCheckHook`
  # doesn't find extension modules installed in $out/${python.sitePackages},
  # and the tests rely upon them. This was initially reported upstream at
  # https://github.com/libnano/primer3-py/issues/120 and we investigate this
  # downstream at: https://github.com/NixOS/nixpkgs/issues/255262.
  preCheck = ''
    python setup.py build_ext --inplace
  '';

  pythonImportsCheck = [
    "primer3"
  ];

  meta = with lib; {
    description = "Oligo analysis and primer design";
    homepage = "https://github.com/libnano/primer3-py";
    changelog = "https://github.com/libnano/primer3-py/blob/v${version}/CHANGES";
    license = with licenses; [ gpl2Only ];
    maintainers = with maintainers; [ fab ];
  };
}