1 diff --git a/pip/_vendor/pep517/in_process/__init__.py b/pip/_vendor/pep517/in_process/__init__.py
2 index c932313..a01143b 100644
3 --- a/pip/_vendor/pep517/in_process/__init__.py
4 +++ b/pip/_vendor/pep517/in_process/__init__.py
5 @@ -10,8 +10,13 @@ try:
6 import importlib.resources as resources
8 def _in_proc_script_path():
9 - return resources.path(__package__, '_in_process.py')
10 + if resources.is_resource(__package__, '_in_process.py'):
11 + return resources.path(__package__, '_in_process.py')
12 + return resources.path(__package__, '_in_process.pyc')
15 def _in_proc_script_path():
16 - yield pjoin(dirname(abspath(__file__)), '_in_process.py')
17 + _in_proc_script = pjoin(dirname(abspath(__file__)), '_in_process.py')
18 + if not os.path.isfile(_in_proc_script):
19 + _in_proc_script = pjoin(dirname(abspath(__file__)), '_in_process.pyc')
20 + yield _in_proc_script