Fix resolving FQDN when resolved is enabled

modules/default.nix

@@ -167,5 +167,15 @@
     (lib.mkIf (!config.sbruder.full) {
       documentation.enable = lib.mkDefault false;
     })
+    (lib.mkIf (config.services.resolved.enable) {
+      # With NixOS’s default database order for hosts,
+      # resolving the FQDN with hostname -f always returns “localhost”
+      # when resolved is enabled.
+      # This changes the priority of the files database,
+      # which fixes this.
+      # This workaround was taken from
+      # https://github.com/NixOS/nixpkgs/issues/132646#issuecomment-1782684381
+      system.nssDatabases.hosts = lib.mkOrder 500 [ "files" ];
+    })
   ];
 }