nixos-rebuild repl and then you can inspect things like config.services.resolved.enable or :p options.services.resolved.enable.definitionsWithLocations With a

nixos-rebuild repl and then you can inspect things like config.services.resolved.enable or :p options.services.resolved.enable.definitionsWithLocations With a default config you start with a console, systemd, dbus and some things to make it boot. There is barely anything.