Activate the virtual environment and install dependencies:

make env
make enter

Build the whole documentation:

make html

For more options see:

make help

To install packages in conda environment you can use both conda and pip.

Note that pip is installed in the conda environment which uses python3, and is related to pip3 inside the virtual environment, whereas invocation of pip3 directly uses your system pip3 instance, typically located in /usr/bin/pip3