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

flync
1.0.11.dev0

This version was deleted from PyPI around 2026-02-22. Installing fails with:
$ pip3 install flync==1.0.11.dev0 ERROR: Could not find a version that satisfies the requirement flync==1.0.11.dev0
View other deleted versions of flync

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/2026-02-21/ \ flync==1.0.11.dev0
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Or, download files manually

And install manually via pip:
flync-1.0.11.dev0-py3-none-any.whl (18.7MB)
flync-1.0.11.dev0.tar.gz (18.5MB)