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

quarkcircuit
0.5.1

This version was deleted from PyPI around 2026-05-28. Installing fails with:
$ pip3 install quarkcircuit==0.5.1 ERROR: Could not find a version that satisfies the requirement quarkcircuit==0.5.1
View other deleted versions of quarkcircuit

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/2026-05-27/ \ quarkcircuit==0.5.1
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Or, download files manually

And install manually via pip:
quarkcircuit-0.5.1-py3-none-any.whl (62.9KB)
quarkcircuit-0.5.1.tar.gz (51.4KB)