push sheeet

pkgs/development/python-modules/mypy/extensions.nix

@@ -0,0 +1,42 @@
+{
+  lib,
+  fetchFromGitHub,
+  buildPythonPackage,
+  flit-core,
+  pytestCheckHook,
+  pythonAtLeast,
+}:
+
+buildPythonPackage rec {
+  pname = "mypy-extensions";
+  version = "1.1.0";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "python";
+    repo = "mypy_extensions";
+    tag = version;
+    hash = "sha256-HNAFsWX4tU9hfZkKxLNJn1J+H3uTesQflbRPlo3GQ4k=";
+  };
+
+  dependencies = [ flit-core ];
+
+  # make the testsuite run with pytest, so we can disable individual tests
+  nativeCheckInputs = [ pytestCheckHook ];
+
+  enabledTestPaths = [ "tests/testextensions.py" ];
+
+  disabledTests = lib.optionals (pythonAtLeast "3.14") [
+    # https://github.com/python/mypy_extensions/issues/65
+    "test_py36_class_syntax_usage"
+  ];
+
+  pythonImportsCheck = [ "mypy_extensions" ];
+
+  meta = {
+    description = "Experimental type system extensions for programs checked with the mypy typechecker";
+    homepage = "https://www.mypy-lang.org";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ lnl7 ];
+  };
+}