Can't use Postgres Unix Sockets with Wallabag Docker container...

Trying to setup wallabag with postgres database, using unix sockets instead of TCP. Seems like adding this to ansible's entry point should work:
database_socket: "{{ lookup('env', 'SYMFONYENVDATABASE_SOCKET')|default('~', true) }}"
but unfortunately it isn't.

I have a patch, but it didn't work (so no use in a PR)

Any insights in how to make this work?