proguard command from this-project

build.sbt

commands <+= thisProject { p =>
  Command.command("proguard")(st => {
    val extracted = Project.extract(st)
    Project.runTask(packageT in (p, Android),
      extracted.append(Seq(
        useProguard in Android := true,
        useProguardInDebug in Android := true
      ), st)
    )
    st
  })
}

[info] Loading project definition from /Users/pnguyen/workspace/.../project
/Users/pnguyen/workspace/.../build.sbt:23: error: overloaded method value in with alternatives:
  (p: sbt.Reference,t: sbt.Scoped)sbt.TaskKey[java.io.File] <and>
  (p: sbt.Reference,c: sbt.ConfigKey)sbt.TaskKey[java.io.File] <and>
  (c: sbt.ConfigKey,t: sbt.Scoped)sbt.TaskKey[java.io.File]
 cannot be applied to (sbt.ResolvedProject, sbt.Configuration)
Error occurred in an application involving default arguments.
    Project.runTask(packageT in (p, Android),