I am currently trying to build an app with pyinstaller. I have gotten the error The \'google-api-python-client\' distribution was not found and is required by the appl
make sure that pip is linked to pip3 (Python 3) and not pip2 (Python2). On many OS(es) and distros, that's still the case.
Check if that solves your problem:
python3 -m pip install --upgrade google-api-python-client
If it did then add an alias to your .bashrc that links pip to pip3 and not pip2.
e.g.
echo "alias pip='pip3'" >> ~/.bashrc