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

jupyterlab-launcher-navigate-to-kernel-extension
1.1.16

This version was deleted from PyPI around 2025-12-19. Installing fails with:
$ pip3 install jupyterlab-launcher-navigate-to-kernel-extension==1.1.16 ERROR: Could not find a version that satisfies the requirement jupyterlab-launcher-navigate-to-kernel-extension==1.1.16

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/2025-12-18/ \ jupyterlab-launcher-navigate-to-kernel-extension==1.1.16
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