[tor-relays] Relays on NixOS

Hey, I wanted to ask whether there any relay operators that also run relays on NixOS. What is your setup? Do you use the package/module from nixpkgs? How do you run multiple relays? Do you override the nixpkgs? ... I am currently thinking on collecting some resources regarding that, any feedback/knowledge here would be very appreciated. :-) Thank You Cλara