Неразрешенная зависимость от sbt-android-plugin 0.6.0-SNAPSHOT?

Я просто выполнил шаги Сборка приложений Scala для Android с использованием Scala , и когда я запустил sbt внутри папки проекта, я получил следующее неразрешенная ошибка зависимости:

[info] Loading project definition from /Users/macarse/Documents/scalatest/project/plugins
[info] Updating {file:/Users/macarse/Documents/scalatest/project/plugins/}default-dd299a...
[warn]  module not found: org.scala-tools.sbt#sbt-android-plugin_2.9.1;0.6.0-SNAPSHOT
[warn] ==== typesafe-ivy-releases: tried
[warn]   http://repo.typesafe.com/typesafe/ivy-releases/org.scala-tools.sbt/sbt-android-plugin_2.9.1/0.6.0-SNAPSHOT/ivys/ivy.xml
[warn]   -- artifact org.scala-tools.sbt#sbt-android-plugin_2.9.1;0.6.0-SNAPSHOT!sbt-android-plugin_2.9.1.jar:
[warn]   http://repo.typesafe.com/typesafe/ivy-releases/org.scala-tools.sbt/sbt-android-plugin_2.9.1/0.6.0-SNAPSHOT/jars/sbt-android-plugin_2.9.1.jar
[warn] ==== local: tried
[warn]   /Users/macarse/.ivy2/local/org.scala-tools.sbt/sbt-android-plugin_2.9.1/0.6.0-SNAPSHOT/ivys/ivy.xml
[warn]   -- artifact org.scala-tools.sbt#sbt-android-plugin_2.9.1;0.6.0-SNAPSHOT!sbt-android-plugin_2.9.1.jar:
[warn]   /Users/macarse/.ivy2/local/org.scala-tools.sbt/sbt-android-plugin_2.9.1/0.6.0-SNAPSHOT/jars/sbt-android-plugin_2.9.1.jar
[warn] ==== public: tried
[warn]   http://repo1.maven.org/maven2/org/scala-tools/sbt/sbt-android-plugin_2.9.1/0.6.0-SNAPSHOT/sbt-android-plugin_2.9.1-0.6.0-SNAPSHOT.pom
[warn]   -- artifact org.scala-tools.sbt#sbt-android-plugin_2.9.1;0.6.0-SNAPSHOT!sbt-android-plugin_2.9.1.jar:
[warn]   http://repo1.maven.org/maven2/org/scala-tools/sbt/sbt-android-plugin_2.9.1/0.6.0-SNAPSHOT/sbt-android-plugin_2.9.1-0.6.0-SNAPSHOT.jar
[warn] ==== Scala-Tools Maven2 Repository: tried
[warn]   http://scala-tools.org/repo-releases/org/scala-tools/sbt/sbt-android-plugin_2.9.1/0.6.0-SNAPSHOT/sbt-android-plugin_2.9.1-0.6.0-SNAPSHOT.pom
[warn]   -- artifact org.scala-tools.sbt#sbt-android-plugin_2.9.1;0.6.0-SNAPSHOT!sbt-android-plugin_2.9.1.jar:
[warn]   http://scala-tools.org/repo-releases/org/scala-tools/sbt/sbt-android-plugin_2.9.1/0.6.0-SNAPSHOT/sbt-android-plugin_2.9.1-0.6.0-SNAPSHOT.jar
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  ::          UNRESOLVED DEPENDENCIES         ::
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  :: org.scala-tools.sbt#sbt-android-plugin_2.9.1;0.6.0-SNAPSHOT: not found
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[error] {file:/Users/macarse/Documents/scalatest/project/plugins/}default-dd299a/*:update: sbt.ResolveException: unresolved dependency: org.scala-tools.sbt#sbt-android-plugin_2.9.1;0.6.0-SNAPSHOT: not found
Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore? 

Что мне не хватает?