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

isobiscuit
0.1.81

This version was deleted from PyPI around 2025-12-04. Installing fails with:
$ pip3 install isobiscuit==0.1.81 ERROR: Could not find a version that satisfies the requirement isobiscuit==0.1.81
View other deleted versions of isobiscuit

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/2025-12-03/ \ isobiscuit==0.1.81
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Or, download files manually

And install manually via pip:
isobiscuit-0.1.81-py3-none-any.whl (22.8KB)
isobiscuit-0.1.81.tar.gz (18.0KB)