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

nikgapps
2.63

This version was deleted from PyPI around 2024-06-18. Installing fails with:
$ pip3 install nikgapps==2.63 ERROR: Could not find a version that satisfies the requirement nikgapps==2.63
View other deleted versions of nikgapps

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/2024-06-17/ \ nikgapps==2.63
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Or, download files manually

And install manually via pip:
NikGapps-2.63-py3-none-any.whl (42.6MB)
nikgapps-2.63.tar.gz (42.6MB)