diff --git a/lass/1systems/hilum/config.nix b/lass/1systems/hilum/config.nix
index d4a389a4a..f66a0abe9 100644
--- a/lass/1systems/hilum/config.nix
+++ b/lass/1systems/hilum/config.nix
@@ -21,13 +21,6 @@
         source /grub/autoiso.cfg
       }
     '';
-    extraFiles."/grub/autoiso.cfg" = (pkgs.stdenv.mkDerivation {
-      name = "autoiso.cfg";
-      src = pkgs.grub2.src;
-      phases = [ "unpackPhase" "installPhase" ];
-      installPhase = ''
-        cp docs/autoiso.cfg $out
-      '';
-    });
+    extraFiles."/grub/autoiso.cfg" = "${pkgs.grub2.src}/docs/autoiso.cfg";
   };
 }