To verify that everything works fine, do sbt run.
Note that currently SBT doesn't support recompilation of macro clients if the dependencies of the macro implementation have changed - macro clients are only recompiled when the macro definition itself is: sbt/sbt#399.
Huge thanks to Paul Butcher (https://github.com/paulbutcher/ScalaMock/blob/typemacros/project/Build.scala) and Adam Warski (https://github.com/adamw/scala-macro-debug) whose SBT projects I used as prototypes for this one.