Merge pull request #236027 from iliana/grub-dont-die

      backgroundColor = f cfg.backgroundColor;

      entryOptions = f cfg.entryOptions;

      subEntryOptions = f cfg.subEntryOptions;

      grub = f grub;

      # PC platforms (like x86_64-linux) have a non-EFI target (`grubTarget`), but other platforms

      # (like aarch64-linux) have an undefined `grubTarget`. Avoid providing the path to a non-EFI

      # GRUB on those platforms.

      grub = f (if (grub.grubTarget or "") != "" then grub else "");

      grubTarget = f (grub.grubTarget or "");

      shell = "${pkgs.runtimeShell}";

      fullName = lib.getName realGrub;