pip-build-standalone
This package was deleted from PyPI around 2025-04-19. Installing fails with:
$ pip3 install pip-build-standalone
ERROR: Could not find a version that satisfies the requirement pip-build-standalone (from versions: none)
ERROR: No matching distribution found for pip-build-standalone

Install through StableBuild
You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \
-i https://YOUR_API_KEY.pypimirror.stablebuild.com/2025-04-18/ \
pip-build-standalone
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)