qt5-widgets Configuration Options

[AN]

Hi KDE Team:

I noticed after a recent upgrade that the options changed for qt5-widgets. 
Previuosly they were set for gtk2 and now "The following configuration 
options are available for qt5-widgets-5.7.1:
      GTK3=off: GTK+-based Qt theme"

Would it be possible to get a manual over ride and be able to use GTK2?

Something like what was done for qt4:
<make.conf>
OPTIONS_SET=CUPS
QT4_OPTIONS=CUPS NAS QGTKSTYLE

The reason I ask is because I use the MATE desktop and I would like to 
continue to use the GTK2 style, that's why I chose to use MATE.  There 
might also be other users that are affected by this.  Thanks in advance.

Regards,

Andy