Why does sbt download a different Scala version than the one in build.sbt?
<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>