title: I can't set the default version of Scala for Play
body: <p>I can't set the version of Scala for a Play application:</p>
  
  <pre><code>//project/Build.scala
  
  import sbt._
  import play.Project._
  import sbt.Keys._
  
  object AppBuild extends Build {
    val appName = .....
    val appVersion = .....
    val appDependencies = Seq(jdbc, anorm)
  
    val main = play.Project(appName, appVersion, appDependencies)
    lazy val buildSettings = Seq(
      organization := "fdsfds"
      ,version := "1.0-SNAPSHOT123"
      ,scalaVersion := "2.10.3"
    )
  }
  </code></pre>
  
  <p>I seemed like it didn't work. Then I commented out <code>version</code> and <code>scalaVersion</code> and created a new file:</p>
  
  <pre><code>//project/build.sbt
  
  version in ThisBuild := "0.1"
  
  scalaVersion in ThisBuild := "2.10.3"
  </code></pre>
  
  <p>And yet when I say <code>play</code> is responds:</p>
  
  <pre><code>play 2.2.1 built with Scala 2.10.2 (running Java 1.7.0_25), http://www.playframework.com
  [my_app] $ show scala-version
  [info] 2.10.2
  </code></pre>
  
  <p>I'm using <code>sbt 0.13</code> and play <code>2.2.1</code>. The default (and the only I guess) scala version on my computer is <code>2.10.3</code>.</p>
  
  <p>How do I make this app use scala <code>2.10.3</code> by default?</p>