/usr/lib/ is in libkf5people-dev 5.18.0-0ubuntu1.
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/KF5People/
/usr/lib/x86_64-linux-gnu/cmake/KF5People/KPeopleTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5People/KF5PeopleConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5People/KF5PeopleConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5People/KPeopleTargets-debian.cmake
/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_KPeople.pri
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_KPeopleWidgets.pri
/usr/lib/x86_64-linux-gnu/libKF5PeopleWidgets.so
/usr/lib/x86_64-linux-gnu/libKF5People.so
/usr/lib/x86_64-linux-gnu/libKF5PeopleBackend.so