ScalaBlitz 1.0-M4 for Scala 2.11 has just been released, bringing several fixes to corner cases of the optimize{} block!

You can add it as an SBT dependency at Sonatype OSS.

<dependency>
  <groupId>com.github.scala-blitz</groupId>
  <artifactId>scala-blitz_2.11</artifactId>
  <version>1.0-M4</version>
</dependency>

Or, in SBT:

libraryDependencies += "com.github.scala-blitz" %% "scala-blitz" % "1.0-M4"