Illustrating a bug in rollup-plugin-commonjs and node@6

index.js

import {fooga} from "./required.js";

console.log(fooga);

package.json

{
  "name": "rollup-plugin-commonjs-bug",
  "version": "1.0.0",
  "main": "index.js",
  "devDependencies": {
    "rollup": "^0.26.2",
    "rollup-plugin-commonjs": "^2.2.1"
  },
  "scripts": {
    "start": "rollup -config ./rollup.config.js -i ./index.js"
  }
}

required.js

exports.fooga = 1;
exports.booga = 2;

rollup.config.js

module.exports = {
    plugins : [
        require("rollup-plugin-commonjs")()
    ]
};