You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
dmclc was reported malicious
OSV:MAL-2026-2106 - Malicious code in dmclc (PyPI)

dmclc
2.1.0

This version was deleted from PyPI around 2026-03-24. Installing fails with:
$ pip3 install dmclc==2.1.0 ERROR: Could not find a version that satisfies the requirement dmclc==2.1.0
View other deleted versions of dmclc

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/2026-03-23/ \ dmclc==2.1.0
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:
dmclc-2.1.0-py3-none-any.whl (3.1KB)
dmclc-2.1.0.tar.gz (2.7KB)