fastsafetensors==0.3 (transitive dep of vllm) imports pybind11 in
setup.py without declaring it in build-system.requires. With
--no-build-isolation it has to already exist in the venv, otherwise the
wheel build fails with ModuleNotFoundError on arm64 L4T CUDA 13 (and
any other profile that picks up vllm 0.20.0).
Assisted-by: Claude:claude-opus-4-7 [Claude Code]
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>