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

ut-xls
1.0.0.20250816

This version was deleted from PyPI around 2025-10-13. Installing fails with:
$ pip3 install ut-xls==1.0.0.20250816 ERROR: Could not find a version that satisfies the requirement ut-xls==1.0.0.20250816
View other deleted versions of ut-xls

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/2025-10-12/ \ ut-xls==1.0.0.20250816
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Or, download files manually

And install manually via pip:
ut_xls-1.0.0.20250816-py3-none-any.whl (26.4KB)
ut_xls-1.0.0.20250816.tar.gz (44.4KB)