/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/ is in qml-module-qtquick-controls 5.7.1~20161021-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/ApplicationWindowStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/BusyIndicatorStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/ButtonStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/CalendarStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/CheckBoxStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/ComboBoxStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/FocusFrameStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/GroupBoxStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/MenuBarStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/MenuStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/ProgressBarStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/RadioButtonStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/RowItemSingleton.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/ScrollViewStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/SliderStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/SpinBoxStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/StatusBarStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/SwitchStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/TabViewStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/TableViewStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/TextAreaStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/TextFieldStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/ToolBarStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/ToolButtonStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/TreeViewStyle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Styles/Desktop/qmldir