diff --git a/nixos/modules/system/boot/loader/grub/grub.nix b/nixos/modules/system/boot/loader/grub/grub.nix
index 8f2f578e3070..e0171a71da93 100644
--- a/nixos/modules/system/boot/loader/grub/grub.nix
+++ b/nixos/modules/system/boot/loader/grub/grub.nix
@@ -699,7 +699,7 @@ in
 
       boot.loader.grub.extraPrepareConfig =
         concatStrings (mapAttrsToList (n: v: ''
-          ${pkgs.coreutils}/bin/cp -pf "${v}" "@bootPath@/${n}"
+          ${pkgs.coreutils}/bin/install -Dp "${v}" "${efi.efiSysMountPoint}/"${escapeShellArg n}
         '') config.boot.loader.grub.extraFiles);
 
       assertions = [