anchor.diff:          ExecStart = "${pkgs.nginx}/bin/nginx -c ${configFile} -p ${cfg.stateDir}";
         };
       };
  - 
  +
       users.extraUsers.nginx = {
         group = "nginx";
       };
  - 
  +
       users.extraGroups.nginx = {};
     };
   }
  
positive.code: { config, pkgs, ... }:
   
  with pkgs.lib;
   
  let
    cfg = config.services.nginx;
    configFile = pkgs.writeText "nginx.conf" ''
      ${cfg.config}
    '';
  in
   
  {
    options = {
      services.nginx = {
  
negative.code:           Enable the nginx Web Server.
          ";
        };
  
        config = mkOption {
          default = "";
          description = "
  