You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

ssm-simulators
0.9.0b5

This version was deleted from PyPI around 2025-06-28. Installing fails with:
$ pip3 install ssm-simulators==0.9.0b5 ERROR: Could not find a version that satisfies the requirement ssm-simulators==0.9.0b5

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/2025-06-27/ \ ssm-simulators==0.9.0b5
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)