get warnings from nix-mode

[YievCkim]

Hi,
When I use nix-mode I get this warning message:

Warning (comp): nix-mode.el:362:37: Warning: value returned from (match-beginning 0) is unused

$ emacs --version
GNU Emacs 28.2
Copyright (C) 2022 Free Software Foundation, Inc.
GNU Emacs comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GNU Emacs
under the terms of the GNU General Public License.
For more information about these matters, see the file named COPYING.

emacs comes from Nixos pkgs and nix-mode was installed from melpa using emacs package manager.