New plugin: Qukeys (yet another SpaceCadet/DualUse-type plugin)

I’m not sure what that means. I did this:

~/.../keyboardio/avr > git pull

This appeared to do what I needed, but the error persisted. Looking at the documentation here:

I then tried:

~/.../keyboardio/avr > make checkout-submodules
git pull
Already up-to-date.
git submodule update --init --recursive
Submodule 'libraries/Kaleidoscope-NumPad' (https://github.com/Keyboardio/Kaleidoscope-NumPad) registered for path 'libraries/Kaleidoscope-NumPad'
Cloning into '/home/tws/Arduino/hardware/keyboardio/avr/libraries/Kaleidoscope-NumPad'...
Submodule path 'libraries/Kaleidoscope-NumPad': checked out '952198a98af9a19174d9ba1ea73d8515a0f28ebb'

I’m still getting the same errors when I try to make with QUkeys included.