whoa you can depend on git projects from sbt just put this in project/ and `sbt console`

DemoBuild.scala

import sbt._
import Keys._

object DemoBuild extends Build {
  val macros = RootProject(uri("git://github.com/edofic/reactive-macros"))
   
  val main = Project("main", file(".")).settings(
    scalaVersion := "2.10.0"  
  ) dependsOn macros
}