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

nao-core
0.1.6rc5

This version was deleted from PyPI around 2026-04-28. Installing fails with:
$ pip3 install nao-core==0.1.6rc5 ERROR: Could not find a version that satisfies the requirement nao-core==0.1.6rc5
View other deleted versions of nao-core

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/2026-04-27/ \ nao-core==0.1.6rc5
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:
nao_core-0.1.6rc5-py3-none-macosx_15_0_arm64.whl (66.3MB)
nao_core-0.1.6rc5-py3-none-macosx_15_0_x86_64.whl (38.8MB)
nao_core-0.1.6rc5-py3-none-manylinux2014_aarch64.whl (53.0MB)
nao_core-0.1.6rc5-py3-none-manylinux2014_x86_64.whl (86.9MB)
nao_core-0.1.6rc5-py3-none-win_amd64.whl (55.1MB)