How can I compile a library with Carthage using the latest beta of Xcode? : <p>I am testing out Swift 3 with Xcode 8 Beta (8S128d), which leads me to a situation where my Carthage-built libraries are not compatible with the source base.</p>

<p><code>Module file was created by an older version of the compiler; rebuild 'SwiftValidator' and try again</code>.</p>

<p>How can I configure Carthage so that <code>carthage update</code> uses the Beta compiler rathe rthan the standard one?</p>
