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

pyenvelop
2.0.3.3

This version was deleted from PyPI around 2025-05-28. Installing fails with:
$ pip3 install pyenvelop==2.0.3.3 ERROR: Could not find a version that satisfies the requirement pyenvelop==2.0.3.3
View other deleted versions of pyenvelop

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/2025-05-27/ \ pyenvelop==2.0.3.3
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
pyenvelop-2.0.3.3-py3-none-any.whl (37.4KB)