title: How to develop sbt plugin in multi-project build with projects that use it?
body: <p>Is it possible to build an sbt plugin in a multi-project setup and use that plugin in some other sub-project of the same multi-project?</p>
  
  <p>For example:</p>
  
  <pre><code>root/
  +  mySbtPlugin/
  +  myProject/
     +  project/
        +  plugins.sbt    // Uses `mySbtPlugin`
  </code></pre>