{ config, pkgs, lib, ... }: {
  environment.variables.SHELL = lib.getExe pkgs.fish;
  environment.shells = [ pkgs.fish ];
  programs.fish = {
    enable = true;
    useBabelfish = true;
    babelfishPackage = pkgs.babelfish;
    # needed to address bug where $PATH is not properly set for fish:
    # https://github.com/LnL7/nix-darwin/issues/122
    shellInit = ''
      for p in (string split : ${config.environment.systemPath})
        if not contains $p $fish_user_paths
          set -Ua fish_user_paths $p
        end
      end
    '';
  };
}