nix-dotfiles/modules/locale.nix

{ lib, ... }:
{
  time.timeZone = lib.mkDefault "America/New_York";
  console.keyMap = lib.mkDefault "us";

  i18n = {
    defaultLocale = lib.mkDefault "en_US.utf8";
    supportedLocales = lib.mkDefault [ "en_US.UTF-8/UTF-8" ];
    extraLocaleSettings = lib.mkDefault {
      LC_ADDRESS = "en_US.UTF-8";
      LC_IDENTIFICATION = "en_US.UTF-8";
      LC_MEASUREMENT = "en_US.UTF-8";
      LC_MONETARY = "en_US.UTF-8";
      LC_NAME = "en_US.UTF-8";
      LC_NUMERIC = "en_US.UTF-8";
      LC_PAPER = "en_US.UTF-8";
      LC_TELEPHONE = "en_US.UTF-8";
      LC_TIME = "en_US.UTF-8";
    };
  };
}