Qbs plugin ignoring -settingspath?

Hi,

I run Qt Creator built from Git branch 3.0 (last build at SHA-1:30d0eb6325d).
I always run with -settingspath option, precisely with:

XQTC=$HOME/dev/qt/_git/qt-creator/_build
${XQTC}/bin/qtcreator -settingspath ${XQTC}/.config

Regardless, I'm always getting this file created

$HOME/.config/QtProject/qbs.conf

I can manually remove $HOME/.config/QtProject,
launch QtC as above, open a .qbs project and the file is back there.

Shouldn't it respect the -settingspath?

Best regards,