$ pipenv run jupyter labextension install jupyterlab-s3-browser
Loading .env environment variables…
An error occured.
ValueError: The extension "jupyterlab-s3-browser" does not yet support the current version of JupyterLab.
Conflicting Dependencies:
JupyterLab Extension Package
>=4.0.2 <4.1.0 4.0.0 @jupyterlab/coreutils
See the log file for details: /tmp/jupyterlab-debug-kwkdeu54.log
just a FYI