Section 2 of this page shows how to setup python for building firmware. It seems the rest of the tutorials assume you are building on a modern Ubuntu, so I would suggest changing the following lines:
pip install pyelftools
pip install pycryptodomex
to:
sudo apt install python3-pyelftools
sudo apt install python3-pycryptodome
I would also suggest adding:
sudo apt install python-is-python3
My reasons are that you can not/should not install the above packages to the global python environment with pip. Also, the makefiles for M33 firmware call 'python' which does not exist on a new ubuntu install (well, it didn't on mine). Installing python-is-python3 is the recommended way to resolve this.
Alternately use a virtual environment, but the firmware build system seems to assume use of the global python.
