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

nabla-ml
25.529

This version was deleted from PyPI around 2025-06-03. Installing fails with:
$ pip3 install nabla-ml==25.529 ERROR: Could not find a version that satisfies the requirement nabla-ml==25.529
View other deleted versions of nabla-ml

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/2025-06-02/ \ nabla-ml==25.529
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Or, download files manually

And install manually via pip:
nabla_ml-25.529-py3-none-any.whl (42.2KB)
nabla_ml-25.529.tar.gz (31.3KB)