Target build of ethos-u-vela fails

If I try and build ethos-u-vela for target, it fails to configure:

CMake Error at /work/ross/build/tmp/work/cortexa57-poky-linux/ethos-u-vela/4.4.0/recipe-sysroot-native/usr/share/cmake-4.1/Modules/FindPackageHandleStandardArgs.cmake:227 (message):
  Could NOT find Python3 (missing: Python3_INCLUDE_DIRS Development.Module)
  (found suitable exact version "3.13.9")

Looks like the setuptools (which is pretty bad at cross) is trying to tell CMake (which is bad at cross, and python) what python to use and the detection then fails. I filed artificial-intelligence/ethos-u/ethos-u-vela#13 but if this isn't isolated to my build then I suggest changing the recipe so that it does inherit native and there isn't a target recipe that doesn't work.