{
  lib,
  pkgs,
  ...
}:
let
  zshSourceCommon = ./zsh/common;

  isDarwin = pkgs.stdenv.hostPlatform.isDarwin;
  isLinux = pkgs.stdenv.hostPlatform.isLinux;
in
{

  # Let Home Manager install and manage itself.
  programs.home-manager.enable = true;

  programs.bat = {
    enable = true;
  };

  programs.zsh = {
    enable = true;

    autocd = lib.mkDefault true;

    shellAliases =
      {
        cat = lib.mkDefault "bat --paging=never";
        nixfix = lib.mkDefault "nix fmt ./**/*.nix";
      }
      // (
        if isDarwin then
          {
            hm-switch = lib.mkDefault "darwin-rebuild switch --flake ~/.config/nix";
          }
        else if isLinux then
          {
            hm-switch = lib.mkDefault "home-manager switch --flake ~/.config/nix";
          }
        else
          { }
      );

    initExtra = ''
      for file in ${zshSourceCommon}/*.zsh; do
          source "$file"
      done
    '';
  };
}