qt5-style-plugins 5.0.0+git23.g335dbec-2build4 (armhf binary) in ubuntu bionic

 Qt is a cross-platform C++ application framework. Qt's primary feature
 is its rich set of widgets that provide standard GUI functionality.
 .
 This package contains the following widget styles:
  - Cleanlooks
  - Motif
  - Plastique
  - GTK+ 2
 .
 It also provides the GTK+ 2 platformtheme, which you would likely want
 to use if you want the GTK+ 2 style. Export QT_QPA_PLATFORMTHEME=gtk2 to
 enable it for all Qt applications.