The non-CpuOnly path relied on `pip install .` yielding a CUDA torch, but
the Windows PyPI torch wheel is CPU-only (unlike Linux, whose default wheel
bundles CUDA). GPU support in the "NVIDIA" package was therefore an implicit
property of the build host's pip resolution and could silently regress to
CPU. Force-install the cu124 wheel from the PyTorch index so the NVIDIA
build is deterministically GPU-capable; the CPU path is likewise made
explicit so it downgrades a host that resolved a CUDA wheel.
Co-authored-by: Thales <>
Tha.Les
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