case os:getenv("JSX_NOMAPS") or proplists:get_value(jsx_nomaps, CONFIG, false) of
  false ->
    try file:script("config/maps") of
      {ok, true} -> [{erl_opts, [{d, release_supports_maps}]}] ++ CONFIG;
      _ -> CONFIG
    catch _:_ -> CONFIG
    end;
  _ -> CONFIG
end.