Automatic qmlplugindump doesn't use QML2_IMPORT_PATH

I have custom Qt Quick plugins which are layed out in shadow build directory as in install directory. Unfortunately Qt creator doesn't add path to shadowbuild directory as last argument of qmlplugindump nor it sets additional environment variables from build environment variables (ideally) or from kit environment.

I would expect to be possible to set kit variable once to:

QML2_IMPORT_PATH=%{CurrentProject:BuildPath}

And use it in every project.