As a quick note to self, here’s an example of how to set
scalacOptions in an SBT build.sbt file:
scalacOptions ++= Seq( "-Xfatal-warnings", "-deprecation", "-feature", "-unchecked", "-language:implicitConversions", "-language:higherKinds", "-language:existentials", "-language:postfixOps" )
scalacOptions lets you set Scala compiler options in your SBT project build.
I got that example from my earlier very large Scala/SBT build.sbt example.
Also, I just saw that tpolecat has put together a nice list of scalaOptions flags at this URL.