Setting up calibre-server on NixOS

Setting up calibre server is not fully declarative yet, as far as I can see. Once I get more familiar with NixOS I can imagine myself contributing to try to make it possible (if even possible). For now, this is how I managed to get it to work how I want: My initial config looked like this { services.calibre-server = { enable = true; port = 1212; }; } But I soon noticed, that the service was not starting with the following error: There is no calibre library at: /var/lib/calibre-...