there is a bunch of qmk stuff out there this is what you need for qmk and the ergodox ez keyboard…
https://docs.qmk.fm/ - qmk documentation
https://www.pjrc.com/teensy/loader_linux.html
***if you are programming it with the qmk toolbox make sure that your have karabiner elements turned off
qmk builder can be done via docker. This means that it is way easier to build than dealing with all the dependencies for building, just use docker.
docker run -e keymap=default_modded -e keyboard=ergodox_ez --rm -v $('pwd'):/qmk:rw edasque/qmk_firmware
docker run -e keymap=ridingintraffic -e keyboard=ergodox_ez --rm -v $('pwd'):/qmk:rw edasque/qmk_firmware
docker run -e keymap=ridingintraffic -e keyboard=planck/rev4 --rm -v $('pwd'):/qmk:rw edasque/qmk_firmware
location for qmk build and install https://github.com/qmk/qmk_toolbox/releases