Bad option: --allow-superuser (Meteor 1.9 deployment)

We are trying to update our app to Meteor 1.9, but in our CI we are getting this error when building the app.

exec: /builder/home/.meteor/packages/meteor-tool/.1.9.0.1mtsmz6.qnno++os.linux.x86_64+web.browser+web.browser.legacy+web.cordova/mt-os.linux.x86_64/dev_bundle/bin/node: bad option: --allow-superuser

Has anyone seen this error before?