SBT - Failed to precise Play 2 app's project d

I'm creating a play 2 project using Scala as main language and so need a rest client implemented in Scala.

Unfortunately, I can't easily use the known Java Jersey-Client.

I found on github this probably great api: sjersey-client

Using SBT as dependency management tool, I try to indicate to play app its dependency to sjersey:

object ApplicationBuild extends Build {

  val appName = "myWebapp"
  val appVersion = "1.0-SNAPSHOT"

  val appDependencies = Seq(
    jdbc,
    anorm
  )

  lazy val sjersey = RootProject(uri("git://github.com/FaKod/sjersey-client.git"))

  val main = play.Project(appName, appVersion, appDependencies).dependsOn(sjersey).settings(
    scalaVersion := "2.10.0"
  )

}

Then I run the command: play reload update but update failed:

[warn] Binary version (2.10) for dependency org.scala-lang#scala-library;2.10.0
[warn] in myWebapp#myWebapp_2.9.2;1.0-SNAPSHOT differs from Scala binary version in project (2.9.2).
[warn]  module not found: play#play_2.9.2;2.1-RC1              


[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  ::          UNRESOLVED DEPENDENCIES         ::
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  :: play#play_2.9.2;2.1-RC1: not found
[warn]  :: play#play-jdbc_2.9.2;2.1-RC1: not found
[warn]  :: play#anorm_2.9.2;2.1-RC1: not found
[warn]  :: play#play-test_2.9.2;2.1-RC1: not found
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[error] (mywebapp/*:update) sbt.ResolveException: unresolved dependency: play#play_2.9.2;2.1-RC1: not found
[error] unresolved dependency: play#play-jdbc_2.9.2;2.1-RC1: not found
[error] unresolved dependency: play#anorm_2.9.2;2.1-RC1: not found
[error] unresolved dependency: play#play-test_2.9.2;2.1-RC1: not found
[error] Total time: 4 s, completed 16 janv. 2013 19:36:37

But when I remove the dependsOn precision to Play! project, update and compilation are fine.

I'm blocked, what could be the issue?

You can also try this if you don't want update sjersey scala version :

object ApplicationBuild extends Build {

  val appName = "myWebapp"
  val appVersion = "1.0-SNAPSHOT"

  val appDependencies = Seq(
    jdbc,
    anorm
  )

  val moreResolvers = resolvers ++= Seq(
    "fakod-releases"   at   "https://raw.github.com/FaKod/fakod-mvn-repo/master/releases",
    "fakod-snapshots"  at   "https://raw.github.com/FaKod/fakod-mvn-repo/master/snapshots")

  val main = play.Project(appName, appVersion, appDependencies).settings(
    moreResolvers,
    libraryDependencies ++= Seq(
      "org.scala-libs" % "sjersey-client" %  "0.2.0" intransitive)

  )

}