Trying to create a map for my macbook, error on the F4 key

[Vermoot]

Hey there!
I'm trying to set up xmk native on my macbook so I can use a ZMK keymap on it, which will be awesome.
Trying to create a map for it, this is what I'm doing:

xmk on  main [?] took 26s
❯ ./src/xmk -k /dev/input/by-id/usb-Apple_Inc._Apple_Internal_Keyboard___Trackpad-event-kbd -c ./src/maps/macbook/macbook

Then I hit every key from top-lef to bottom-right, but doing so I get an error on the F4 key (actually XF86LaunchB according to xev).
Here is what the output looks like:

xmk on  main [?] took 26s
❯ ./src/xmk -k /dev/input/by-id/usb-Apple_Inc._Apple_Internal_Keyboard___Trackpad-event-kbd -c ./src/maps/macbook/macbook
esc brightnessdown brightnessup scale Traceback (most recent call last):
  File "/home/vermoot/Projects/xmk/./src/xmk", line 82, in <module>
    code = evdev.ecodes.KEY[event.code][4:].lower()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'list' object has no attribute 'lower'

Is that an xmk bug, or a mistake on my part?

[manna-harbour]

It looks like there can be multiple keycodes per key in some circumstances. The code will need to be updated to handle that.

As a workaround, you might be able to remove the extra keycodes from that key with xmodmap or similar.