opencv uses "setuptools==59.2.0",

[henrykironde]

Keep setuptools to >59 Ref: https://github.com/opencv/opencv-python/blob/8ad8ec1bae8aad196b3e9117a4b2b47d58547d47/pyproject.toml#L15

[ethanwhite]

Thanks @henrykironde. I totally believe that this will fix things and that this is why we had that version pegged in the first place, but I'm confused as why. The build system should handle any needed upstream dependencies and all of this works fine locally:

$ conda create -n opencvtest python=3
$ conda activate opencvtest
$ conda install -c conda-forge opencv
$ conda list | grep setuptools

# Note that setuptools is the default 68.x, not the old version
setuptools                68.2.2          py312h06a4308_0 

Python 3.12.2 | packaged by conda-forge | (main, Feb 16 2024, 20:50:58) [GCC 12.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import setuptools
>>> setuptools.__version__
'68.2.2'
>>> import cv2
>>> cv2.__version__
'4.9.0'

Are we building from source on GH Actions or something?