Yarn will now be installed for Ruby applications that have a `yarn.lock` file
Change effective on 27 October 2021
Ruby applications using the
heroku/ruby buildpack now receive a default version of
yarn installed if they have a
yarn.lock file in the root directory of their application.
Prior to this change, only applications using the
webpacker gem would trigger node installation logic. This change is intended to facilitate Rails 7 applications using
Note Applications using the
heroku/nodejsbuildpack before the
heroku/rubybuildpack will not see a change in behavior
For more information, see Heroku Ruby support documentation.