On Sat, 28 Oct 2017 01:05:08 -0200, Teresa e Junior wrote: >QT_QPA_PLATFORMTHEME=gtk2 If it doesn't work with installed https://packages.ubuntu.com/zesty/qt5-style-plugins , you could try to find a Qt5 theme, that comes close to your desired theme, by using https://sourceforge.net/projects/qt5ct/ .