1. cd /opt/Rocket.Chat/programs/server/node_modules/fibers/
  2. ln -s /usr/local/n/versions/node/8.9.3/bin/node-gyp /bin/
  3. node-gyp rebuild
  4. cp build/Release/fibers.node bin/linux-x64-57/fibers.node

https://github.com/RocketChat/Rocket.Chat/issues/9167#issuecomment-352804066

By karlo