You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
pyrofork-dev was reported malicious
OSV:MAL-2025-6572 - Malicious code in pyrofork-dev (PyPI)

pyrofork-dev
2.2.7.dev202308026561

This version was deleted from PyPI around 2024-02-07. Installing fails with:
$ pip3 install pyrofork-dev==2.2.7.dev202308026561 ERROR: Could not find a version that satisfies the requirement pyrofork-dev==2.2.7.dev202308026561

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/2024-02-06/ \ pyrofork-dev==2.2.7.dev202308026561
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Or, download files manually

And install manually via pip: