ERROR: Failed to import module __PyInstaller_hooks_0_narwhals required by hook for module hook-narwhals.py.

**Describe the bug** * Which hook/library isn't working? narwhals * Does the error get raised while building or when running? It get raised while building. **To Reproduce** A minimal example file(test.py): ``` import narwhals ``` PyInstaller command: ``` pyinstaller test.py ``` Error: ``` Traceback (most recent call last): File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\depend\imphook.py", line 422, in _load_hook_module self._hook_module = importlib_load_source(self.hook_module_name, self.hook_filename) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\compat.py", line 615, in importlib_load_source mod_loader.exec_module(mod) File "<frozen importlib._bootstrap_external>", line 940, in exec_module File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed File "D:\work\python_work\test\venv\Lib\site-packages\_pyinstaller_hooks_contrib\stdhooks\hook-narwhals.py", line 18, in <module> datas += copy_metadata("typing_extensions") ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\utils\hooks\__init__.py", line 969, in copy_metadata dist = importlib_metadata.distribution(package_name) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\DELL\AppData\Local\Programs\Python\Python311\Lib\importlib\metadata\__init__.py", line 964, in distribution return Distribution.from_name(distribution_name) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\DELL\AppData\Local\Programs\Python\Python311\Lib\importlib\metadata\__init__.py", line 561, in from_name raise PackageNotFoundError(name) importlib.metadata.PackageNotFoundError: No package metadata was found for typing_extensions During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<frozen runpy>", line 198, in _run_module_as_main File "<frozen runpy>", line 88, in _run_code File "D:\work\python_work\test\venv\Scripts\pyinstaller.exe\__main__.py", line 7, in <module> File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\__main__.py", line 231, in _console_script_run run() File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\__main__.py", line 215, in run run_build(pyi_config, spec_file, **vars(args)) File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\__main__.py", line 70, in run_build PyInstaller.building.build_main.main(pyi_config, spec_file, **kwargs) File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\building\build_main.py", line 1270, in main build(specfile, distpath, workpath, clean_build) File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\building\build_main.py", line 1208, in build exec(code, spec_namespace) File "D:\work\python_work\test\test.spec", line 4, in <module> a = Analysis( ^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\building\build_main.py", line 582, in __init__ self.__postinit__() File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\building\datastruct.py", line 184, in __postinit__ self.assemble() File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\building\build_main.py", line 712, in assemble program_scripts.append(self.graph.add_script(script)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\depend\analysis.py", line 283, in add_script self._top_script_node = super().add_script(pathname) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\lib\modulegraph\modulegraph.py", line 1177, in add_script self._process_imports(n) File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\lib\modulegraph\modulegraph.py", line 2629, in _process_imports target_modules = self._safe_import_hook(*import_info, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\depend\analysis.py", line 454, in _safe_import_hook ret_modules = super()._safe_import_hook( ^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\lib\modulegraph\modulegraph.py", line 2086, in _safe_import_hook target_modules = self.import_hook( ^^^^^^^^^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\lib\modulegraph\modulegraph.py", line 1249, in import_hook target_package, target_module_partname = self._find_head_package( ^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\lib\modulegraph\modulegraph.py", line 1428, in _find_head_package target_package = self._safe_import_module( ^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\depend\analysis.py", line 516, in _safe_import_module return super()._safe_import_module(module_basename, module_name, parent_package) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\lib\modulegraph\modulegraph.py", line 1809, in _safe_import_module self._process_imports(n) File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\lib\modulegraph\modulegraph.py", line 2629, in _process_imports target_modules = self._safe_import_hook(*import_info, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\depend\analysis.py", line 385, in _safe_import_hook excluded_imports = self._find_all_excluded_imports(source_module.identifier) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\depend\analysis.py", line 373, in _find_all_excluded_imports excluded_imports.update(module_hook.excludedimports) ^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\depend\imphook.py", line 343, in __getattr__ self._load_hook_module() File "D:\work\python_work\test\venv\Lib\site-packages\PyInstaller\depend\imphook.py", line 425, in _load_hook_module raise ImportErrorWhenRunningHook(self.hook_module_name, self.hook_filename) PyInstaller.exceptions.ImportErrorWhenRunningHook: ERROR: Failed to import module __PyInstaller_hooks_0_narwhals required by hook for module D:\work\python_work\test\venv\Lib\site-packages\_pyinstaller_hooks_contrib\stdhooks\hook-narwhals.py. Please check whether module __PyInstaller_hooks_0_narwhals actually exists and whether the hook is compatible with your version of D:\work\python_work\test\venv\Lib\site-packages\_pyinstaller_hooks_contrib\stdhooks\hook-narwhals.py: You might want to read more about hooks in the manual and provide a pull-request to improve PyInstaller. ``` **Expected behavior** Build successfully **Desktop (please complete the following information):** - OS: Windows - Python Version: 3.11.0 - Version of `pyinstaller-hooks-contrib`: 2025.3 - Version of PyInstaller: 6.13.0 - Version of Narwhals: 1.37.1 **Additional context** It worked when the version of `pyinstaller-hooks-contrib` was 2025.2 [test.zip](https://github.com/user-attachments/files/20023477/test.zip)