/usr/ is in libxcomp-dev 2:3.5.99.16-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/x86_64-linux-gnu/
/usr/include/x86_64-linux-gnu/nx/
/usr/include/x86_64-linux-gnu/nx/MD5.h
/usr/include/x86_64-linux-gnu/nx/NX.h
/usr/include/x86_64-linux-gnu/nx/NXalert.h
/usr/include/x86_64-linux-gnu/nx/NXpack.h
/usr/include/x86_64-linux-gnu/nx/NXproto.h
/usr/include/x86_64-linux-gnu/nx/NXvars.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libXcomp.a
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/nxcomp.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libxcomp-dev/
/usr/share/doc/libxcomp-dev/copyright
/usr/lib/x86_64-linux-gnu/libXcomp.so
/usr/share/doc/libxcomp-dev/changelog.Debian.gz
/usr/share/doc/libxcomp3-dev