Override default extensions installation directory

I’m using JupyterLab on a JupyterHub server, on which I have no admin/root permissions.
I’d like to install an extension (jupyterlab-unfold), but cannot do so since I don’t have write permissions to the jupyter site-packages directory:

Error: ERROR: Could not install packages due to an OSError: [Errno 13] Permission denied: '/opt/software/python/jupyter/lib/python3.12/site-packages/jupyterlab_unfold'
Check the permissions.

Can I override this default installation directory by pointing to a new folder in my home? I figured that I can personalize JupyterLab by creating the ~/.jupyter/jupyter_lab_config.py config, but I haven’t figured out how to set a new extensions folder.