driverkit is a minimal wrapper around Karabiner-DriverKit-VirtualHIDDevice (dext) and Karabiner-VirtualHIDDevice (kext) intended for kanata macos support.
The DriverKit backend targets Karabiner-DriverKit-VirtualHIDDevice v8.0.0 (client protocol 7). It is not compatible with older protocol-5 daemons such as VirtualHIDDevice v6.2.0.
Update the submodules first
git submodule update --init --recursive
then
cargo build