You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
karma-jasmine-sinon was reported malicious
OSV:MAL-2025-6532 - Malicious code in karma-jasmine-sinon (PyPI)

karma-jasmine-sinon
2.1.1

This version was deleted from PyPI around 2025-06-10. Installing fails with:
$ pip3 install karma-jasmine-sinon==2.1.1 ERROR: Could not find a version that satisfies the requirement karma-jasmine-sinon==2.1.1
View other deleted versions of karma-jasmine-sinon

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/2025-06-09/ \ karma-jasmine-sinon==2.1.1
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Or, download files manually

And install manually via pip:
karma_jasmine_sinon-2.1.1-py3-none-any.whl (1.4KB)
karma_jasmine_sinon-2.1.1.tar.gz (1.7KB)