qmlscene: static build does not provide qtquick plugins

i've compiled qt on osx as static binaries, this means that plugins need to be imported explicitly in the c++ code. the qmlscene tool does not seem to provide the plugins for QtQuick, they cannot be imported from the qml-file:

/path/to/main.qml:1 module "QtQuick" plugin "qtquick2plugin" not found

the file starts with:

import QtQuick 2.1
import QtQuick.Controls 1.0
import QtQuick.Layouts 1.0

it would be great if the static build of qmlscene could provide the plugins of the built-in qtquick plugins.