fix aarch64 build

devices/r2s/default.nix

@@ -13,6 +13,7 @@ inputs:
           swap = [ "/nix/swap/swap" ];
         };
         network = {};
+        grub = null;
       };
       services =
       {

modules/system/grub.nix

@@ -83,5 +83,11 @@ inputs:
         };
       }
     ])
-    ({});
+    ({
+      boot.loader =
+      {
+        grub.enable = false;
+        generic-extlinux-compatible.enable = true;
+      };
+    });
 }

modules/system/kernel/default.nix

@@ -39,7 +39,11 @@ inputs:
         "bridge"
       ]
         ++ (inputs.lib.optionals (kernel.variant != "nixos") [ "crypto_simd" ]);
-      extraModulePackages = with inputs.config.boot.kernelPackages; [ v4l2loopback zenpower ];
+      extraModulePackages = with inputs.config.boot.kernelPackages;
+      [
+        v4l2loopback
+        (if inputs.pkgs.stdenv.hostPlatform.linuxArch == "x86_64" then zenpower else inputs.pkgs.emptyDirectory)
+      ];
       # force i2c-hid-acpi to load after pinctrl-tigerlake
       extraModprobeConfig = "softdep i2c-hid-acpi pre: pinctrl-tigerlake";
       kernelParams = [ "delayacct" ];