How to add brotli module to nginx under NixOS

configuration.nix

{ config, pkgs, ... }:

{
  nixpkgs.overlays = [
    (self: super: {
       nginxStable = super.nginxStable.override {
          modules = [
            self.nginxModules.brotli
          ];
       };
     })
  ];
  
  services.nginx.enable = true;
  services.nginx.commonHttpConfig = ''
    brotli on;
    brotli_static on;
    brotli_types application/json application/javascript application/xml application/xml+rss image/svg+xml text/css text/html text/javascript text/plain text/xml;
  '';
}