babel-plugin-transform-es2015-modules-amd产生无效的AMD模块

Question

我有以下package.json：

{
  "name": "watchman",
  "version": "1.0.0",
  "description": "Simple watcher for ES6 to AMD conversion",
  "author": "Luciad NV",
  "license": "MIT",
  "scripts": {
    "build": "cross-env NODE_OPTIONS=--max_old_space_size=8192 babel es6/geometry es6/ria es6/symbology -d release --watch"
  },
  "devDependencies": {
    "babel-cli": "^6.26.0",
    "babel-plugin-transform-es2015-modules-amd": "^6.24.1",
    "babel-preset-env": "^1.7.0",
    "cross-env": "^5.2.0"
  }
}

我有以下.babelrc：

{
  "presets": ["babel-preset-env"],
  "plugins": ["transform-es2015-modules-amd"]
}

我的es6/ria文件夹中有以下es6模块：

import Object from "./Dependency";

  export default {

  };

如果我运行npm run build，则会生成具有以下实现的AMD模块：

define(["exports", "./Dependency"], function (exports, _Dependency) {
  "use strict";

  _Dependency2.default.defineProperty(exports, "__esModule", {
    value: true
  });

  var _Dependency2 = _interopRequireDefault(_Dependency);

  function _interopRequireDefault(obj) {
    return obj && obj.__esModule ? obj : {
      default: obj
    };
  }

  exports.default = {};
});

如您所见，_Dependency2仅在引用_Dependency2.default之后才定义，这会引发错误。

我做错什么了吗？还是这是Babel中的错误？