This is because pikepdf < 1.19.0 is incompatible with bybind11 2.6. This was fixed in https://github.com/pikepdf/pikepdf/commit/5394b7855eb87f637316432b2b597294adcb974e
- Bug#975202: pikepdf: FTBFS: RuntimeError: Prohi... Lucas Nussbaum
- Bug#975202: (no subject) Jerome Robert
- Bug#975202: add patch Matthias Klose
- Processed: add patch Debian Bug Tracking System