anchor.diff:        ${optionalString (cfg.dbPassword != "") ''
           DBPassword = ${cfg.dbPassword}
         ''}
  +
  +      ${config.services.zabbixServer.extraConfig}
       '';
   
     useLocalPostgres = cfg.dbServer == "localhost" || cfg.dbServer == "";
  
positive.code: 
      services.zabbixServer.enable = mkOption {
        default = false;
        description = ''
          Whether to run the Zabbix server on this machine.
        '';
  
negative.code: 
      services.zabbixServer.dbPassword = mkOption {
        default = "";
        type = types.str;
        description = "Password used to connect to the database server.";
      };
  
      services.zabbixServer.extraConfig = mkOption {
        default = "";
        type = types.lines;
        description = ''
          Configuration that is injected verbatim into the configuration file.
        '';
      };
  
    };
  