/usr/lib/ is in qtquickcontrols2-5-dev 5.7.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/Qt5QuickControls2/
/usr/lib/x86_64-linux-gnu/cmake/Qt5QuickControls2/Qt5QuickControls2Config.cmake
/usr/lib/x86_64-linux-gnu/cmake/Qt5QuickControls2/Qt5QuickControls2ConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/libQt5QuickControls2.prl
/usr/lib/x86_64-linux-gnu/libQt5QuickTemplates2.prl
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/Qt5QuickControls2.pc
/usr/lib/x86_64-linux-gnu/qt5/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_lib_quickcontrols2.pri
/usr/lib/x86_64-linux-gnu/libQt5QuickControls2.so
/usr/lib/x86_64-linux-gnu/libQt5QuickTemplates2.so