/usr/lib/ is in libkproperty3-dev 3.1.0-2.
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/KPropertyCore3/
/usr/lib/x86_64-linux-gnu/cmake/KPropertyCore3/KPropertyCoreConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/KPropertyCore3/KPropertyCoreConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/KPropertyCore3/KPropertyCoreQCHTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/KPropertyCore3/KPropertyCoreTargets-debian.cmake
/usr/lib/x86_64-linux-gnu/cmake/KPropertyCore3/KPropertyCoreTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/KPropertyWidgets3/
/usr/lib/x86_64-linux-gnu/cmake/KPropertyWidgets3/KPropertyWidgetsConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/KPropertyWidgets3/KPropertyWidgetsConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/KPropertyWidgets3/KPropertyWidgetsQCHTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/KPropertyWidgets3/KPropertyWidgetsTargets-debian.cmake
/usr/lib/x86_64-linux-gnu/cmake/KPropertyWidgets3/KPropertyWidgetsTargets.cmake
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/KPropertyCore3.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/KPropertyWidgets3.pc
/usr/lib/x86_64-linux-gnu/libKPropertyCore3.so
/usr/lib/x86_64-linux-gnu/libKPropertyWidgets3.so