legacy nix don't understand braced options and options outside it both

configuration.nix

@@ -454,7 +454,7 @@ in
             qt6.wrapQtAppsHook
             qt6.qttools
           ];
-          
+
           buildInputs = with pkgs; [
             qt6.qtbase
             qt6.qtsvg
@@ -473,7 +473,7 @@ in
               lrelease "$f" -qm "$out_path"
             done
           '';
-          
+
           installPhase = ''
             runHook preInstall
             cmake --install build --prefix $out
@@ -602,7 +602,7 @@ in
         sha256 = "sha256-nKK8HRzeqDixpdKmgacjhNzanJaTsAnYLC6nCbmWXuU=";
       }
             ];
-      
+
         })
 
         qtcreator
@@ -675,7 +675,7 @@ in
 
   imports = [
     inputs.guardant.nixosModules.grdcontrol
-    ./hardware-configuration.nix 
+    ./hardware-configuration.nix
   ];
   programs.tmux = {
     enable = true;
@@ -709,6 +709,7 @@ in
         grub = {
           enable = true;
           efiSupport = true;
+          configurationLimit = 5;
           device = "nodev";
           useOSProber = true;
           theme = "${pkgs.sleek-grub-theme.override {
@@ -723,6 +724,7 @@ in
         grub = {
           enable = true;
           device = "/dev/sda";
+          configurationLimit = 5;
           theme = "${pkgs.sleek-grub-theme.override {
             withStyle = "orange";
             withBanner = "Загрузчик Linux";
@@ -761,8 +763,7 @@ in
     randomizedDelaySec = "45min"; # машины не запускают GC одновременно
     options = "--delete-older-than 14d";
   };
-  # Хранить не более 5 поколений в меню GRUB
-  boot.loader.grub.configurationLimit = 5;
+
   # Периодический TRIM для SSD (безопасен и на HDD — просто no-op)
   services.fstrim.enable = true;
   # nix-daemon стартует только после Yggdrasil, иначе nixos.builds.node недостижим