git submodule update --init --recursive

make venv
source venv/bin/activate
python -m pip install qmk
qmk setup -H vial-qmk

One may need to use the scripts from qmk to help with dependencies, e.g. util/install/debian.sh.

Seems some keys are arranged differently than the default layout, please apply some swapping if needed.

qmk flash -kb planck/rev7 -km vial

Lastly, visit https://vial.rocks to configure layout.