I recently learned about the option to use pip install in a Jupyter notebook to temporarily install a package.
When I try this in my install for ArcGIS Pro 3.0.3, it fails with the following message
pip install squarify
'C:\Program' is not recognized as an internal or external command,
operable program or batch file.
I'm assuming that pip is installed in C:\Program Files\ArcGIS\Pro\bin\Python with the space in Program Files causing the problem.
Using pip install in a stand alone Anaconda environment works with no problem.