try

hosts/fw.cloonar.com/modules/staticids.nix

@@ -3,8 +3,8 @@ let
   inherit (lib) types;
 in
 {
-  options.services = {
-    ids.uids = lib.mkOption {
+  options.services.ids = {
+    uids = lib.mkOption {
       internal = true;
       description = lib.mdDoc ''
         The user IDs used for containers.
@@ -12,7 +12,7 @@ in
       type = types.attrsOf types.int;
     };
 
-    ids.gids = lib.mkOption {
+    gids = lib.mkOption {
       internal = true;
       description = lib.mdDoc ''
         The group IDs used for containers.