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

ultraplot
1.61.0

This version was deleted from PyPI around 2025-10-08. Installing fails with:
$ pip3 install ultraplot==1.61.0 ERROR: Could not find a version that satisfies the requirement ultraplot==1.61.0
View other deleted versions of ultraplot

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/2025-10-07/ \ ultraplot==1.61.0
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Or, download files manually

And install manually via pip:
ultraplot-1.61.0-py3-none-any.whl (12.9MB)
ultraplot-1.61.0.tar.gz (14.1MB)