iOS: Running the WebView example fails from Qt Creator

Using RC package: qt-enterprise-mac-x64-android-ios-5.4.0-rc_2014-11-13_13-45-00-89.dmg on Mac 10.9

Trying to run the WebView example from Qt Creator, in debug or release mode fails with the error:

Starting remote process.
QML debugging is enabled. Only use this in a safe environment.
Unknown options: e, x, t, r, a, -, a, r, g, s.
exited with exit code 1, 
Run ended.
Starting remote process.
Unknown options: e, x, t, r, a, -, a, r, g, s.
exited with exit code 1, 
Run ended.

I can't find where "extra -args" comes from

Opening the matching Xcode project and running the example from there succeed.