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

arq-base-python
0.9.8.0b11

This version was deleted from PyPI around 2026-01-10. Installing fails with:
$ pip3 install arq-base-python==0.9.8.0b11 ERROR: Could not find a version that satisfies the requirement arq-base-python==0.9.8.0b11
View other deleted versions of arq-base-python

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/2026-01-09/ \ arq-base-python==0.9.8.0b11
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Or, download files manually

And install manually via pip:
arq_base_python-0.9.8.0b11-py3-none-any.whl (1.3KB)
arq_base_python-0.9.8.0b11.tar.gz (0.9KB)