title: Carthage update - Task failed with exit code 65
body: <p>I have 2 versions of Xcode installed, 8.3.2 and 8.2.1.</p>
  
  <p>I'm working on a project that was written in Swift 2 and installed few third-party's via Carthage.
  After pulling branch I did <code>carthage update</code> : then I got this error:</p>
  
  <pre><code>$ carthage update
  *** Fetching SwiftyJSON
  *** Fetching Alamofire
  *** Fetching Reachability.swift
  *** Fetching AlamofireImage
  *** Checking out Alamofire at "3.5.1"
  *** Checking out AlamofireImage at "2.5.0"
  *** Checking out Reachability.swift at "v2.4"
  *** Checking out SwiftyJSON at "54017d514a87b2b855b407131292c510cdeb65f8"
  *** xcodebuild output can be found in /var/folders/6s/5fm277hs03qb526nqykyplk40000gn/T/carthage-xcodebuild.JxFgDC.log
  *** Building scheme "Alamofire watchOS" in Alamofire.xcworkspace
  Build Failed
      Task failed with exit code 65:
      /usr/bin/xcrun xcodebuild -workspace /Users/maor/myProj/myProj/Carthage/Checkouts/Alamofire/Alamofire.xcworkspace -scheme Alamofire\ watchOS -configuration Release -derivedDataPath /Users/maor/Library/Caches/org.carthage.CarthageKit/DerivedData/Alamofire/3.5.1 -sdk watchos ONLY_ACTIVE_ARCH=NO BITCODE_GENERATION_MODE=bitcode CODE_SIGNING_REQUIRED=NO CODE_SIGN_IDENTITY= CARTHAGE=YES clean build
  
  This usually indicates that project itself failed to compile. Please check the xcodebuild log for more details: /var/folders/6s/5fm277hs03qb526nqykyplk40000gn/T/carthage-xcodebuild.JxFgDC.log
  </code></pre>
  
  <hr>
  
  <blockquote>
    <p>part of carthage-xcodebuild.JxFgDC.log</p>
  </blockquote>
  
  <pre><code>=== CLEAN TARGET Alamofire watchOS OF PROJECT Alamofire WITH CONFIGURATION Release ===
  
  Check dependencies
  “Swift Language Version” (SWIFT_VERSION) is required to be configured correctly for targets which use Swift. Use the [Edit &gt; Convert &gt; To Current Swift Syntax…] menu to choose a Swift version or use the Build Settings editor to configure the build setting directly.
  
  ** CLEAN FAILED **
  
  
  The following build commands failed:
      Check dependencies
  (1 failure)
  === BUILD TARGET Alamofire watchOS OF PROJECT Alamofire WITH CONFIGURATION Release ===
  
  Check dependencies
  “Swift Language Version” (SWIFT_VERSION) is required to be configured correctly for targets which use Swift. Use the [Edit &gt; Convert &gt; To Current Swift Syntax…] menu to choose a Swift version or use the Build Settings editor to configure the build setting directly.
  
  ** BUILD FAILED **
  
  
  The following build commands failed:
      Check dependencies
  (1 failure)
  </code></pre>