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

libnpp
11.8.0.86

This version was deleted from PyPI around 2025-11-04. Installing fails with:
$ pip3 install libnpp==11.8.0.86 ERROR: Could not find a version that satisfies the requirement libnpp==11.8.0.86
View other deleted versions of libnpp

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/2025-11-03/ \ libnpp==11.8.0.86
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:
libnpp-11.8.0.86-py3-none-any.whl (2.4KB)
libnpp-11.8.0.86.tar.gz (2.1KB)