Change effective on 15 August 2017
The Heroku Scala buildpack now includes support for sbt 1.0.0 and future 1.x releases. To use this version on Heroku, define
sbt.version=1.0.0 in an app’s
project/build.properties file. Heroku will install and run the specified sbt version during the next deployment. For more information on this release of sbt see the sbt 1.x documentation, and see the Dev Center for more information on Heroku support for Scala.