def self.kosmtik_command(lat, lon, zlevel, bbox_size, image_size, export_filename)
      mapnik_override = CartoCSSHelper::Configuration.mapnik_reference_version_override
      additional_params = ""
      additional_params += " --mapnik-version=#{mapnik_override}" if mapnik_override
      return base_kosmtik_command(lat, lon, zlevel, bbox_size, image_size, export_filename, additional_params: additional_params)