anchor.diff:      $ZBX_SERVER_PORT = '${toString cfg.server.port}';
       $ZBX_SERVER_NAME = ''';
       $IMAGE_FORMAT_DEFAULT = IMAGE_FORMAT_PNG;
  +
  +    ${cfg.extraConfig}
     '';
   
   in
  
positive.code:         '';
        };
  
      };
    };
  
    # implementation
  
    config = mkIf cfg.enable {
  
      systemd.tmpfiles.rules = [
        "d '${stateDir}' 0750 ${user} ${group} - -"
  
negative.code: let
  
    inherit (lib) mkDefault mkEnableOption mkForce mkIf mkMerge mkOption types;
    inherit (lib) literalExample mapAttrs optionalString versionAtLeast;
  
    cfg = config.services.zabbixWeb;
    fpm = config.services.phpfpm.pools.zabbix;
  