{ config, lib, ... }: {
  options.snowflake = {
    locale = lib.mkOption {
      type = lib.types.str;
      description = "locale";
    };
  };

  config = {
    # Select internationalisation properties.
    i18n.defaultLocale = config.snowflake.locale;
    i18n.extraLocaleSettings = {
      LC_ADDRESS = config.snowflake.locale;
      LC_IDENTIFICATION = config.snowflake.locale;
      LC_MEASUREMENT = config.snowflake.locale;
      LC_MONETARY = config.snowflake.locale;
      LC_NAME = config.snowflake.locale;
      LC_NUMERIC = config.snowflake.locale;
      LC_PAPER = config.snowflake.locale;
      LC_TELEPHONE = config.snowflake.locale;
      LC_TIME = config.snowflake.locale;
    };
  };
}