Description of problem: Package python-ipyparallel fails to build from source in Fedora rawhide. Version-Release number of selected component (if applicable): 6.3.0-4.fc34 Steps to Reproduce: koji build --scratch f35 python-ipyparallel-6.3.0-4.fc34.src.rpm Additional info: This package is tracked by Koschei. See: https://koschei.fedoraproject.org/package/python-ipyparallel