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

riftgun
0.6.0

This version was deleted from PyPI around 2023-11-01. Installing fails with:
$ pip3 install riftgun==0.6.0 ERROR: Could not find a version that satisfies the requirement riftgun==0.6.0
View other deleted versions of riftgun

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/2023-10-31/ \ riftgun==0.6.0
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Or, download files manually

And install manually via pip:
riftgun-0.6.0-py3-none-any.whl (11.0KB)
riftgun-0.6.0.tar.gz (6.2KB)