pythia8 fails to build with Python 3.8.0b1. The build no longer links to libpython, resulting in undefined references to Python API. Code that embeds Python (rather than building an extension module) needs to pass `--embed` to any `python3-config --libs` invocation to build with Python 3.8. More information: https://docs.python.org/3.8/whatsnew/3.8.html#debug-build-uses-the-same-abi-as-release-build For the build logs, see: https://copr-be.cloud.fedoraproject.org/results/@python/python3.8/fedora-rawhide-x86_64/00922606-pythia8/ For all our attempts to build pythia8 with Python 3.8, see: https://copr.fedorainfracloud.org/coprs/g/python/python3.8/package/pythia8/ Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.8: https://copr.fedorainfracloud.org/coprs/g/python/python3.8/ Let us know here if you have any questions.