akka buid error

akka-buid-error

$ sbt update
Getting Scala 2.7.7 ...
:: retrieving :: org.scala-tools.sbt#boot-scala
        confs: [default]
        2 artifacts copied, 0 already retrieved (9911kB/37ms)
Getting org.scala-tools.sbt sbt_2.7.7 0.7.5.RC0 ...
:: retrieving :: org.scala-tools.sbt#boot-app
        confs: [default]
        16 artifacts copied, 0 already retrieved (4270kB/31ms)
[info] Recompiling plugin definition...
[info]    Source analysis: 1 new/modified, 0 indirectly invalidated, 0 removed.
[info]
[info] Updating plugins...
[info] :: retrieving :: plugin-definition#plugin-definition_2.7.7 [sync]
[info]  confs: [compile, runtime, test, provided, system, optional, sources, javadoc]
[info]  3 artifacts copied, 0 already retrieved (427kB/31ms)
[success] Plugins updated successfully.
[info]
[info]  Extracted source plugin ./lib_managed/scala_2.7.7/bnd4sbt-1.0.0.RC4.jar ...
[info]  Extracted source plugin ./lib_managed/scala_2.7.7/spde-sbt-plugin-0.4.2.jar ...
[info] Recompiling plugin...
[info]    Source analysis: 10 new/modified, 0 indirectly invalidated, 0 removed.
[info] Recompiling project definition...
[info]    Source analysis: 1 new/modified, 0 indirectly invalidated, 0 removed.
Getting Scala 2.8.1 ...
downloading http://repo1.maven.org/maven2/org/scala-lang/scala-compiler/2.8.1/scala-compiler-2.8.1.jar ...
        [SUCCESSFUL ] org.scala-lang#scala-compiler;2.8.1!scala-compiler.jar (19232ms)
downloading http://repo1.maven.org/maven2/org/scala-lang/scala-library/2.8.1/scala-library-2.8.1.jar ...
        [SUCCESSFUL ] org.scala-lang#scala-library;2.8.1!scala-library.jar (5723ms)
:: retrieving :: org.scala-tools.sbt#boot-scala
        confs: [default]
        2 artifacts copied, 0 already retrieved (15118kB/46ms)
[info] Building project akka 1.1-SNAPSHOT against Scala 2.8.1
[info]    using AkkaParentProject with sbt 0.7.5.RC0 and Scala 2.7.7
[error] No action named 'bell-style' exists.
[info] Execute 'help' for a list of commands or 'actions' for a list of available project actions and methods.
[info]
[info] Total time: 0 s, completed Mar 24, 2011 12:57:14 PM
[info]
[info] Total session time: 51 s, completed Mar 24, 2011 12:57:14 PM
[error] Error during build.