meteor http

Question

输入meteor add http，添加meteor发送请求的方法，提示
For compatibility, the PACKAGE_DIRS environment variable is deprecated and will be removed in a future Meteor release.
Developers should now use METEOR_PACKAGE_DIRS and Windows projects should now use a semi-colon (;) to separate paths.
http without a version constraint has already been added.

应该怎么修改？