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

git-backupper
0.3.5

This version was deleted from PyPI around 2023-10-01. Installing fails with:
$ pip3 install git-backupper==0.3.5 ERROR: Could not find a version that satisfies the requirement git-backupper==0.3.5
View other deleted versions of git-backupper

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/2023-09-30/ \ git-backupper==0.3.5
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Or, download files manually

And install manually via pip:
git_backupper-0.3.5-py3-none-any.whl (13.0KB)
git-backupper-0.3.5.tar.gz (437.4KB)