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

envelope-decay-fit

This package was deleted from PyPI around 2026-06-04. Installing fails with:
$ pip3 install envelope-decay-fit ERROR: Could not find a version that satisfies the requirement envelope-decay-fit (from versions: none) ERROR: No matching distribution found for envelope-decay-fit

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/2026-06-03/ \ envelope-decay-fit
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Or, download files manually

Choose a version to see all deleted wheels and files. We only show versions that have been deleted on PyPI.
0.1.0
0.1.1
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0.2.0
0.2.1
0.2.2