After you've downloaded or built it, look at the files and if there are any, run the binaries: ls -la /nix/store/6dgwhjpvbv01grfaa17lv0iw612jqf5w-python3.12-pure-protobuf-3.1.4 ls -la /nix/store/6dgwhjpvbv01grfaa17lv0iw612jqf5w-python3.12-pure-protobuf-3.1.4/bin Pre-merge ...
(most recent call last) ~/venv/lib/python3.7/site-packages/google/protobuf/internal/python_message.py in init(self, **kwargs) 517 try: --> 518 copy.MergeFrom(new_val) 519 except TypeError: ~/venv/lib/python3.7/site-packages/google/protobuf/internal/python_message.py in MergeFrom(self, ...