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

aspen_pysys
0.1.0a0

This version was deleted from PyPI around 2026-05-25. Installing fails with:
$ pip3 install aspen_pysys==0.1.0a0 ERROR: Could not find a version that satisfies the requirement aspen_pysys==0.1.0a0
View other deleted versions of aspen_pysys

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/2026-05-24/ \ aspen_pysys==0.1.0a0
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Or, download files manually

And install manually via pip:
aspen_pysys-0.1.0a0-py3-none-any.whl (58.2KB)
aspen_pysys-0.1.0a0.tar.gz (51.7KB)