| --- a/src/pip/_internal/build_env.py | |
| +++ b/src/pip/_internal/build_env.py | |
| @@ -54,7 +54,11 @@ def get_runnable_pip() -> str: | |
| # case, we can use that directly. | |
| return str(source) | |
| - return os.fsdecode(source / "__pip-runner__.py") | |
| + filename = "__pip-runner__.pyc" | |
| + py = source / "__pip-runner__.py" | |
| + if py.is_file(): | |
| + filename = "__pip-runner__.py" | |
| + return os.fsdecode(source / filename) | |
| def _get_system_sitepackages() -> Set[str]: |