title: xcodebuild: error: Unknown build action
body: <p>When I'm try to build from the command line:</p>
  
  <pre><code>xcodebuild -target -project myApp.xcodeproj -scheme myApp -sdk iphoneos -configuration Release archive -archivePath $PWD/build/DDCiOSClient.xcarchive
  </code></pre>
  
  <p>I'm getting this error:</p>
  
  <pre><code>User defaults from command line:
      IDEArchivePathOverride = /depot/myApp/myApp.xcarchive
  
  Build settings from command line:
      SDKROOT = iphoneos9.3
  
  xcodebuild: error: Unknown build action 'myApp.xcodeproj'.
  </code></pre>
  
  <p>Any of you knows why of this error?</p>