gistfile1.scala

autoCompilerPlugins := true,
libraryDependencies <+= scalaVersion {
  v => compilerPlugin(
    "org.scala-lang.plugins" %
    "continuations" %
    "2.10.0-RC5")
    // Use the final Scala version once it's released
},
scalacOptions += "-P:continuations:enable",

gistfile2.scala

"com.typesafe.akka" %% "akka-dataflow" %
  "2.1.0-RC5" cross CrossVersion.full
  // Use the final version of Akka once it's released

gistfile3.scala

import scala.concurrent.ExecutionContext.Implicits.global
  // to have the default ExecutionContext in scope
import scala.concurrent.future
import akka.dataflow._
  // to have access to flow + the conversions from
  // Futures and Promises to dataflow constructs

val f1: Future[Long] = future { 1 * 5 }
val f2: Future[Long] = future { 3 * 5 }

flow { f1() + f2() } onComplete println
  // Will (asynchronously) print out the sum of the
  // result of f1 and f2 once they are done