/usr/ is in libnemo-extension-dev 3.6.5-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/nemo/
/usr/include/nemo/libnemo-extension/
/usr/include/nemo/libnemo-extension/nemo-column-provider.h
/usr/include/nemo/libnemo-extension/nemo-column.h
/usr/include/nemo/libnemo-extension/nemo-extension-types.h
/usr/include/nemo/libnemo-extension/nemo-file-info.h
/usr/include/nemo/libnemo-extension/nemo-info-provider.h
/usr/include/nemo/libnemo-extension/nemo-location-widget-provider.h
/usr/include/nemo/libnemo-extension/nemo-menu-item.h
/usr/include/nemo/libnemo-extension/nemo-menu-provider.h
/usr/include/nemo/libnemo-extension/nemo-menu.h
/usr/include/nemo/libnemo-extension/nemo-name-and-desc-provider.h
/usr/include/nemo/libnemo-extension/nemo-property-page-provider.h
/usr/include/nemo/libnemo-extension/nemo-property-page.h
/usr/include/nemo/libnemo-extension/nemo-simple-button.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/libnemo-extension.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libnemo-extension-dev/
/usr/share/doc/libnemo-extension-dev/copyright
/usr/share/gir-1.0/
/usr/share/gir-1.0/Nemo-3.0.gir
/usr/share/gtk-doc/
/usr/share/gtk-doc/html/
/usr/share/gtk-doc/html/libnemo-extension/
/usr/share/gtk-doc/html/libnemo-extension/ch01.html
/usr/share/gtk-doc/html/libnemo-extension/home.png
/usr/share/gtk-doc/html/libnemo-extension/index.html
/usr/share/gtk-doc/html/libnemo-extension/ix01.html
/usr/share/gtk-doc/html/libnemo-extension/left-insensitive.png
/usr/share/gtk-doc/html/libnemo-extension/left.png
/usr/share/gtk-doc/html/libnemo-extension/libnemo-extension-nemo-column-provider.html
/usr/share/gtk-doc/html/libnemo-extension/libnemo-extension-nemo-column.html
/usr/share/gtk-doc/html/libnemo-extension/libnemo-extension-nemo-extension-types.html
/usr/share/gtk-doc/html/libnemo-extension/libnemo-extension-nemo-file-info.html
/usr/share/gtk-doc/html/libnemo-extension/libnemo-extension-nemo-info-provider.html
/usr/share/gtk-doc/html/libnemo-extension/libnemo-extension-nemo-location-widget-provider.html
/usr/share/gtk-doc/html/libnemo-extension/libnemo-extension-nemo-menu-provider.html
/usr/share/gtk-doc/html/libnemo-extension/libnemo-extension-nemo-menu.html
/usr/share/gtk-doc/html/libnemo-extension/libnemo-extension-nemo-name-and-desc-provider.html
/usr/share/gtk-doc/html/libnemo-extension/libnemo-extension-nemo-property-page-provider.html
/usr/share/gtk-doc/html/libnemo-extension/libnemo-extension-nemo-property-page.html
/usr/share/gtk-doc/html/libnemo-extension/libnemo-extension.devhelp2
/usr/share/gtk-doc/html/libnemo-extension/pt01.html
/usr/share/gtk-doc/html/libnemo-extension/right-insensitive.png
/usr/share/gtk-doc/html/libnemo-extension/right.png
/usr/share/gtk-doc/html/libnemo-extension/style.css
/usr/share/gtk-doc/html/libnemo-extension/up-insensitive.png
/usr/share/gtk-doc/html/libnemo-extension/up.png
/usr/lib/x86_64-linux-gnu/libnemo-extension.so
/usr/share/doc/libnemo-extension-dev/changelog.Debian.gz