Please branch and build python-setuptools-rust in epel9.
python-setuptools-rust is already a buildroot-only package in CentOS 9 Stream, https://gitlab.com/redhat/centos-stream/rpms/python-setuptools-rust . Buildroot-only means that the package is available in the build environment. AFAIK I cannot add the package to epel9 without breaking stuff. Can you work around the problem on your side, e.g. by installing the package in a virtual env?
> Can you work around the problem on your side, e.g. by installing the package in a virtual env? Yes, that can be done. Thanks for looking into it, and for the feedback.
This bug appears to have been reported against 'rawhide' during the Fedora Linux 39 development cycle. Changing version to 39.