title: Why does sbt download a different Scala version than the one in build.sbt?
body: <p>The build.sbt already set</p>
  
  <pre><code>scalaVersion := "2.11.7"
  </code></pre>
  
  <p>However, whenever i run sbt where the build.sbt resides, I always get this error</p>
  
  <pre><code>org.scala-lang#scala-library;2.10.5: configuration not found in
  org.scala-lang#scala-library;2.10.5: 'master(compile)'. Missing
  configuration: 'compile'. It was required from org.scalaz#scalaz-
  effect_2.10;7.1.0 compile
  </code></pre>
  
  <p>At the start, it's actually getting the version 2.10.5</p>
  
  <pre><code>Getting Scala 2.10.5 (for sbt)...
  </code></pre>
  
  <p>Now I cannot proceed.  I am running in my macbook.</p>