Salat build - attempting to configure sbtscalariform formatting preferences

SalatBuild.scala

object Format {
  import com.typesafe.sbtscalariform.ScalariformPlugin
  import ScalariformPlugin._

  lazy val settings = seq(scalariformSettings: _*)  ++ Seq(
    preferences = formattingPreferences
  )

  lazy val formattingPreferences = {
    import scalariform.formatter.preferences._
    ScalariformKeys.preferences := FormattingPreferences().
      setPreference(AlignParameters, true).
      setPreference(AlignSingleLineCaseStatements, true).
      setPreference(CompactControlReadability, true).
      setPreference(CompactStringConcatenation, true).
      setPreference(DoubleIndentClassDeclaration, true).
      setPreference(FormatXml, true).
      setPreference(IndentLocalDefs, true).
      setPreference(IndentPackageBlocks, true).
      setPreference(IndentSpaces, 2).
      setPreference(MultilineScaladocCommentsStartOnFirstLine, true).
      setPreference(PreserveSpaceBeforeArguments, false).
      setPreference(PreserveDanglingCloseParenthesis, false).
      setPreference(RewriteArrowSymbols, false).
      setPreference(SpaceBeforeColon, false).
      setPreference(SpaceInsideBrackets, false).
      setPreference(SpacesWithinPatternBinders, true)
  }
}

And here is what I had in project/plugins/build.sbt which apparently needs to be migrated to project/plugins.sbt:

resolvers += Classpaths.typesafeResolver

addSbtPlugin("com.typesafe.sbtscalariform" % "sbtscalariform" % "0.3.0")