Unresolved SBT dependency

sbt.help

webapp $ play
Getting org.scala-tools.sbt sbt_2.9.1 0.11.3 ...

:: problems summary ::
:::: WARNINGS
		module not found: org.scala-tools.sbt#sbt_2.9.1;0.11.3

	==== local: tried

	  /usr/local/bin/../Cellar/play/2.0.1/bin/../libexec/framework/../repository/local/org.scala-tools.sbt/sbt_2.9.1/0.11.3/ivys/ivy.xml

	==== Maven2 Local: tried

	  file:///Users/Eric/.m2/repository/org/scala-tools/sbt/sbt_2.9.1/0.11.3/sbt_2.9.1-0.11.3.pom

	==== typesafe-ivy-releases: tried

	  http://repo.typesafe.com/typesafe/ivy-releases/org.scala-tools.sbt/sbt_2.9.1/0.11.3/ivys/ivy.xml

	==== Maven Central: tried

	  http://repo1.maven.org/maven2/org/scala-tools/sbt/sbt_2.9.1/0.11.3/sbt_2.9.1-0.11.3.pom

	==== Scala-Tools Maven2 Repository: tried

	  http://scala-tools.org/repo-releases/org/scala-tools/sbt/sbt_2.9.1/0.11.3/sbt_2.9.1-0.11.3.pom

	==== Scala-Tools Maven2 Snapshots Repository: tried

	  http://scala-tools.org/repo-snapshots/org/scala-tools/sbt/sbt_2.9.1/0.11.3/sbt_2.9.1-0.11.3.pom

		::::::::::::::::::::::::::::::::::::::::::::::

		::          UNRESOLVED DEPENDENCIES         ::

		::::::::::::::::::::::::::::::::::::::::::::::

		:: org.scala-tools.sbt#sbt_2.9.1;0.11.3: not found

		::::::::::::::::::::::::::::::::::::::::::::::



:: USE VERBOSE OR DEBUG MESSAGE LEVEL FOR MORE DETAILS
unresolved dependency: org.scala-tools.sbt#sbt_2.9.1;0.11.3: not found
Error during sbt execution: Error retrieving required libraries
  (see /usr/local/bin/../Cellar/play/2.0.1/bin/../libexec/framework/sbt/boot/update.log for complete log)
Error: Could not retrieve sbt 0.11.3

Upgrade sbt-launch.jar to 0.11.3 or play to 2.0.2.