[Mailman-Users] Mailman3 - from Whoosh to Xapian

Hello!

My idea/plan is to replace Whoosh with Xapian. So far i have added this line inside settings.py: 'ENGINE': 'xapian_backend.XapianEngine', and installed pip package: pip install xapian-haystack

Put i think its not enough and im missing something. If i try to do use "mailman-web rebuild_index", then i get some error messages: File "/opt/mailman/venv/lib64/python3.9/site-packages/xapian_backend.py", line 23, in <module> import xapian ModuleNotFoundError: No module named 'xapian'

Any ideas what im missing ?

Br, Kimmo