anchor.diff:        { description = "Zabbix Server";
   
           wantedBy = [ "multi-user.target" ];
  -        after = optional (cfg.dbServer == "localhost") "postgresql.service";
  +        after = optional useLocalPostgres "postgresql.service";
   
           preStart =
             ''
  
positive.code:       ''}
      '';
  
  in
  
  {
  
negative.code: 
      services.zabbixServer.dbServer = mkOption {
        default = "localhost";
        description = ''
          Hostname or IP address of the database server.
          Use an empty string ("") to use peer authentication.
        '';
      };
  
      services.zabbixServer.dbPassword = mkOption {
  