🐛 Bug Report

Docs for my project can not be built non-interactively as 'yarn-build' hangs forever.

Have you read the [Contributing Guidelines on issues]

yes

To Reproduce

git clone https://github.com/avkonst/hookstate
cd hookstate/hookstate.js.org/docs2
yarn build

Expected behavior

Build is finished and process exists

Actual Behavior

Build is successful (according to logs), but the process does not exit.

Your Environment

• Docusaurus version used: 2 alpha 48
• Operating system and version (desktop or mobile): see it on linux (netlify automated build) and windows (my working desktop)

Reproducible Demo

See above how to reproduce