Install python3 dependencies via pip
The packages only contain python2 versions of the libraries, but we need the python3 version instead. Also note that python3 is already installed early on, so we don't need to re-install it here.
The packages only contain python2 versions of the libraries, but we need the python3 version instead. Also note that python3 is already installed early on, so we don't need to re-install it here.