diff --git a/pkgs/build-support/kernel/compress-firmware.nix b/pkgs/build-support/kernel/compress-firmware.nix
index 5eadcc9df589..438b71ef32c7 100644
--- a/pkgs/build-support/kernel/compress-firmware.nix
+++ b/pkgs/build-support/kernel/compress-firmware.nix
@@ -24,7 +24,8 @@ let
     .${type} or (throw "Unsupported compressor type for firmware.");
 
   args = {
-    allowedRequisites = [ ];
+    outputChecks.out.allowedRequisites = [ "out" ];
+    __structuredAttrs = true;
     inherit (compressor) nativeBuildInputs;
   }
   // lib.optionalAttrs (firmware ? meta) { inherit (firmware) meta; };