Как использовать scala-time?

кто-нибудь знает scala-time? (https://github.com/jorgeortiz85/scala-time) Не знаю, как его использовать. Я могу загрузить его (в Linux) и запустить sbt, но всегда одно и то же сообщение об ошибке:

git clone git://github.com/jorgeortiz85/scala-time
cd scala-time
sbt
Getting org.scala-tools.sbt sbt_2.9.1 0.7.4 ...

:: problems summary ::
:::: WARNINGS
        module not found: org.scala-tools.sbt#sbt_2.9.1;0.7.4

    ==== local: tried

      /home/ll/.ivy2/local/org.scala-tools.sbt/sbt_2.9.1/0.7.4/ivys/ivy.xml

      -- artifact org.scala-tools.sbt#sbt_2.9.1;0.7.4!sbt_2.9.1.jar:

      /home/ll/.ivy2/local/org.scala-tools.sbt/sbt_2.9.1/0.7.4/jars/sbt_2.9.1.jar

    ==== Maven2 Local: tried

      file:///home/ll/.m2/repository/org/scala-tools/sbt/sbt_2.9.1/0.7.4/sbt_2.9.1-0.7.4.pom

      -- artifact org.scala-tools.sbt#sbt_2.9.1;0.7.4!sbt_2.9.1.jar:

      file:///home/ll/.m2/repository/org/scala-tools/sbt/sbt_2.9.1/0.7.4/sbt_2.9.1-0.7.4.jar

    ==== typesafe-ivy-releases: tried

      http://repo.typesafe.com/typesafe/ivy-releases/org.scala-tools.sbt/sbt_2.9.1/0.7.4/ivys/ivy.xml

      -- artifact org.scala-tools.sbt#sbt_2.9.1;0.7.4!sbt_2.9.1.jar:

      http://repo.typesafe.com/typesafe/ivy-releases/org.scala-tools.sbt/sbt_2.9.1/0.7.4/jars/sbt_2.9.1.jar

    ==== Maven Central: tried

      http://repo1.maven.org/maven2/org/scala-tools/sbt/sbt_2.9.1/0.7.4/sbt_2.9.1-0.7.4.pom

      -- artifact org.scala-tools.sbt#sbt_2.9.1;0.7.4!sbt_2.9.1.jar:

      http://repo1.maven.org/maven2/org/scala-tools/sbt/sbt_2.9.1/0.7.4/sbt_2.9.1-0.7.4.jar

    ==== Scala-Tools Maven2 Repository: tried

      http://scala-tools.org/repo-releases/org/scala-tools/sbt/sbt_2.9.1/0.7.4/sbt_2.9.1-0.7.4.pom

      -- artifact org.scala-tools.sbt#sbt_2.9.1;0.7.4!sbt_2.9.1.jar:

      http://scala-tools.org/repo-releases/org/scala-tools/sbt/sbt_2.9.1/0.7.4/sbt_2.9.1-0.7.4.jar

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

      http://scala-tools.org/repo-snapshots/org/scala-tools/sbt/sbt_2.9.1/0.7.4/sbt_2.9.1-0.7.4.pom

      -- artifact org.scala-tools.sbt#sbt_2.9.1;0.7.4!sbt_2.9.1.jar:

      http://scala-tools.org/repo-snapshots/org/scala-tools/sbt/sbt_2.9.1/0.7.4/sbt_2.9.1-0.7.4.jar

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

        ::          UNRESOLVED DEPENDENCIES         ::

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

        :: org.scala-tools.sbt#sbt_2.9.1;0.7.4: not found

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

а? Есть ли другие варианты?