opencv-python and similar isn't installing at all in a venv set up with uv venv --relocatable --python 3.12 python_embedded (python_embedded) PS D:\appmana\appmana-comfyui\src\python_embedded_test> uv ...

pip install --no-build-isolation -e src But that initially failed, because the pytorch install bundles with a different cuda version, which was incompatible with my global CUDA 12.9.