Second failure in that venv: 'No module named torch' while installing. xformers
below 0.0.27 has no cp312 wheel, so pip tried to build it from source, and its
setup.py imports torch — which does not exist yet in a fresh venv.

The binding constraint was never audiocraft's torch==2.1.0 (unsatisfiable on
this Python) but xformers, which audiocraft imports at module load: its cp312
wheels start at 0.0.27, and 0.0.28.post3 requires torch==2.5.1 exactly. So the
venv is torch 2.5.1 + xformers 0.0.28.post3 — chosen by what actually has wheels
for this interpreter rather than by what the libraries would prefer.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0182DhR1eFNPQyGmDrpHbedY