I have this multi-module build configuration that I'm trying to get working, but whenever I try to compile the project it fails with the following error:

➜  postgresql-netty git:(multi-module) sbt clean compile
[info] Loading global plugins from /Users/mauricio/.sbt/plugins
[info] Loading project definition from /Users/mauricio/projects/scala/postgresql-netty/project
[info] Set current project to db-async-base (in build file:/Users/mauricio/projects/scala/postgresql-netty/)
[success] Total time: 0 s, completed May 1, 2013 11:18:29 PM
[info] Updating {file:/Users/mauricio/projects/scala/postgresql-netty/}db-async-common...
[info] Updating {file:/Users/mauricio/projects/scala/postgresql-netty/}db-async-base...
[info] Resolving org.specs2#scalaz-core_2.10;7.0.0 ...
[info] Done updating.
[info] Resolving org.scala-lang#scala-library;2.10.1 ...
[info] Done updating.
[info] Updating {file:/Users/mauricio/projects/scala/postgresql-netty/}postgresql-async...
[info] Resolving ch.qos.logback#logback-classic;1.0.9 ...
[info] Compiling 16 Scala sources to /Users/mauricio/projects/scala/postgresql-netty/db-async-common/target/scala-2.10/classes...
[info] Resolving org.specs2#scalaz-core_2.10;7.0.0 ...
[info] Done updating.
scala.reflect.internal.MissingRequirementError: object scala.runtime in compiler mirror not found.
    at scala.reflect.internal.MissingRequirementError$.signal(MissingRequirementError.scala:16)
    at scala.reflect.internal.MissingRequirementError$.notFound(MissingRequirementError.scala:17)
    at scala.reflect.internal.Mirrors$RootsBase.getModuleOrClass(Mirrors.scala:48)
    at scala.reflect.internal.Mirrors$RootsBase.getModuleOrClass(Mirrors.scala:40)
    at scala.reflect.internal.Mirrors$RootsBase.getModuleOrClass(Mirrors.scala:61)
    at scala.reflect.internal.Mirrors$RootsBase.getPackage(Mirrors.scala:172)
    at scala.reflect.internal.Mirr
scala sbt multi-module
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