title: Dependency missing from classpath
body: <p>I have project that collects dependencies for an installer (<a href="https://github.com/jpsacha/sbt-install4j" rel="noreferrer">sbt-install4j</a>) using <code>dependencyClasspath</code>. It works most of the time, except when I have one specific dependency:</p>
  
  <pre><code>libraryDependencies += "org.bytedeco" % "javacpp" % "0.10"
  </code></pre>
  
  <p>"javacpp" will not be added to the <code>dependencyClasspath</code>. You can create a simple SBT project with only that dependency above and try <code>show dependencyClasspath</code>, it will print:</p>
  
  <pre><code>[info] List(Attributed(C:\Users\me\.sbt\boot\scala-2.10.4\lib\scala-library.jar))
  </code></pre>
  
  <p>there is no "javacpp". Any clues what may be happening? Is this an SBT bug?</p>