nix-config/modules/home-manager/terminal/voice.nix

{
  config,
  pkgs,
  lib,
  ...
}: {
  options.user.enable-speech = lib.mkEnableOption "espeak";

  config = lib.mkIf config.user.enable-speech {
    home.shellAliases = {
      say = "espeak -p 10 -s 150 -a 200";
    };
    home.packages = with pkgs; [
      espeak
    ];
    programs.nushell.extraConfig = ''
      alias say = espeak -p 10 -s 150 -a 200
    '';
  };
}