title: Why I can't run sbt after I installed it?
body: <p>I followed the instruction "brew install sbt" and tried to run it using sbt. But I got this. I don't know why. Should I do some extra steps?</p>
  
  <pre><code>java.io.IOException: Not a directory
      at java.io.UnixFileSystem.createFileExclusively(Native Method)
      at java.io.File.createNewFile(File.java:1012)
      at xsbt.boot.Locks$.apply0(Locks.scala:34)
      at xsbt.boot.Locks$.apply(Locks.scala:28)
      at xsbt.boot.Launch.locked(Launch.scala:238)
      at xsbt.boot.Launch.app(Launch.scala:147)
      at xsbt.boot.Launch.app(Launch.scala:145)
      at xsbt.boot.Launch$.run(Launch.scala:102)
      at xsbt.boot.Launch$$anonfun$apply$1.apply(Launch.scala:35)
      at xsbt.boot.Launch$.launch(Launch.scala:117)
      at xsbt.boot.Launch$.apply(Launch.scala:18)
      at xsbt.boot.Boot$.runImpl(Boot.scala:41)
      at xsbt.boot.Boot$.main(Boot.scala:17)
      at xsbt.boot.Boot.main(Boot.scala)
  Error during sbt execution: java.io.IOException: Not a directory
  </code></pre>