[743] broken require server side

I need to use a node module recaptcha2 server side only, which depends in fs. How to reproduce the bug: 1. clone vue init nuxt/express test-nuxt-express 2. npm install --save recaptcha2 3. add this code to pages/index.vue

if (process.server) {
  const recaptcha2 = require('recaptcha2')
}

Now a dependency is not found:

This dependency was not found:

* fs in ./~/request/lib/har.js

I think there is some issue with webpack server side