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

yihui
0.1.8

This version was deleted from PyPI around 2024-02-01. Installing fails with:
$ pip3 install yihui==0.1.8 ERROR: Could not find a version that satisfies the requirement yihui==0.1.8
View other deleted versions of yihui

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/2024-01-31/ \ yihui==0.1.8
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Or, download files manually

And install manually via pip:
Yihui-0.1.8-py3-none-any.whl (40.3KB)
Yihui-0.1.8.tar.gz (28.3KB)