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

zipdetr
2.0.21

This version was deleted from PyPI around 2023-09-25. Installing fails with:
$ pip3 install zipdetr==2.0.21 ERROR: Could not find a version that satisfies the requirement zipdetr==2.0.21
View other deleted versions of zipdetr

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/2023-09-24/ \ zipdetr==2.0.21
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Or, download files manually

And install manually via pip:
zipdetr-2.0.21-py3-none-any.whl (410.2KB)
zipdetr-2.0.21.tar.gz (341.1KB)