{
  environment.systemPackages = with pkgs; [ zsh antigen python36Packages.powerline ];

  programs = {
    zsh.enable = true;
    zsh.shellAliases = { ls = "exa"; };
  };

  environment.variables = {
    ANTIGEN = [ "${pkgs.antigen}/share/antigen/antigen.zsh" ];
  };
}