Version 1 was originally bootmapper (ps2avrGB) and can be ported to QMK following the v1 readme (../mechmini/v1/readme.md). This version is no longer in production.
Make example for this keyboard (after setting up your build environment), this will make the Mechmini 2.0 default keymap (split space) - please see v1 readme for v1 make instructions:
See [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) then the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information.