issue with JSPM 0.15.1 & lodash

how I tried installed jspm modules

method 1

$ jspm install angular
$ jspm install lodash
$ jspm install restangular

import _ from 'lodash'; // imports, but doesn't expose to restangular
import 'angular';
import 'restangular';

method 2

$ jspm install angular
$ jspm install restangular
$ jspm install lodash=npm:lodash

import _ from 'lodash'; // imports, but doesn't expose to restangular
import 'angular';
import 'restangular';

method 3

$ jspm install angular
$ jspm install restangular
$ jspm install github:lodash/lodash

import _ from 'lodash/lodash'; // imports, and exposes to restangular
// import 'lodash/lodash'; // imports and exposes to restangular as well
import 'angular';
import 'restangular';