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

solvent
25.2.15

This version was deleted from PyPI around 2025-12-20. Installing fails with:
$ pip3 install solvent==25.2.15 ERROR: Could not find a version that satisfies the requirement solvent==25.2.15
View other deleted versions of solvent

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/2025-12-19/ \ solvent==25.2.15
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Or, download files manually

And install manually via pip:
solvent-25.2.15-py3-none-any.whl (52.4KB)
solvent-25.2.15.tar.gz (15.2KB)