* Clone and setup the repository at https://github.com/jackhumbert/qmk_firmware.git - pay special attention to the dependencies (for arch users, `pacman -S avr-libc avr-gcc` and `dfu-programmer` in the AUR)
* From `qmk_firmware/keyboard/planck/keymaps/lytedev/` (same as last terminal command directory), run `make dfu` as root (`sudo make dfu`)
**Tip**: If you don't have an extra keyboard to send the `make dfu` command, just prepend `sleep 10 &&` to it to give yourself 10 seconds to hit the flash button.