Since opencv-python version 4.3.0.*, manylinux1 wheels were replaced by manylinux2014 wheels. If your pip is too old, it will try to use the new source distribution introduced in 4.3.0.38 to manually ...

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.

If you see Command python setup.py egg_info failed with error code 1 when Installing Python, then the setup tool on your computer might not be installed or updated.