work around qt4/boost issue on some systems
work around qt4/boost issue on some systems

see
https://bugreports.qt.io/browse/QTBUG-22829

idupree/Lasercake,idupree/Lasercake,idupree/Lasercake,idupree/Lasercake,idupree/Lasercake,idupree/Lasercake,idupree/Lasercake