Bootloader: do not use the QMK bootloader, use the bootloader from [here](https://github.com/mschwingen/modelm-lufa-bootloader)
See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).