/usr/lib/ is in libkf5declarative-dev 5.44.0-0ubuntu3.
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/KF5Declarative/
/usr/lib/x86_64-linux-gnu/cmake/KF5Declarative/KF5DeclarativeConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Declarative/KF5DeclarativeConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Declarative/KF5DeclarativeTargets-debian.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Declarative/KF5DeclarativeTargets.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_KDeclarative.pri
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_QuickAddons.pri
/usr/lib/x86_64-linux-gnu/libKF5CalendarEvents.so
/usr/lib/x86_64-linux-gnu/libKF5Declarative.so
/usr/lib/x86_64-linux-gnu/libKF5QuickAddons.so