You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
chia-pool-reference was reported malicious
OSV:MAL-2026-652 - Malicious code in chia-pool-reference (PyPI)

chia-pool-reference
9.1.0

This version was deleted from PyPI around 2026-02-03. Installing fails with:
$ pip3 install chia-pool-reference==9.1.0 ERROR: Could not find a version that satisfies the requirement chia-pool-reference==9.1.0
View other deleted versions of chia-pool-reference

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/2026-02-02/ \ chia-pool-reference==9.1.0
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
chia_pool_reference-9.1.0-py3-none-any.whl (1.5KB)
chia_pool_reference-9.1.0.tar.gz (2.1KB)