/usr/lib/x86_64-linux-gnu/qtchooser/5.conf is in qtchooser 64-ga1b6736-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/qtchooser/../../../share/qtchooser/qt5-x86_64-linux-gnu.conf