Webkit 'Failed to start " "QtWebProcess"' in an app deployed using macdeployqt

A QtQuick2 app, that uses QtWebKit, the web content is not displayed once it is deployed with macdeployqt. On the console it shows:

Failed to start " "QtWebProcess" org.qt-project.Qt.WebKit.QtWebProcess-3988-4423443776"

I've attached the source code, to reproduce run:

$QTDIR/bin/qmake

make

<try running app here, it works fine, google.com displays>

$QTDIR/bin/macdeployqt qtapp.app -dmg -verbose=3 -qmldir=./qml/qtapp/

<try running app here (from dmg or the copy in the CWD), it fails to display google.com and gives the above error.

Manually copying cp ~/Qt5.2.0/5.2.0-rc1/clang_64/libexec/QtWebProcess into qtapp/qtapp.app/Contents/libexec/QtWebProcess seems to 'solve' it (but would need further work to change the dll paths to be relative).