/usr/ is in libqtruby4shared-dev 4:4.14.3-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/include/
/usr/include/qtruby/
/usr/include/qtruby/marshall_macros.h
/usr/include/qtruby/marshall_basetypes.h
/usr/include/qtruby/marshall.h
/usr/include/qtruby/marshall_complex.h
/usr/include/qtruby/marshall_primitives.h
/usr/include/qtruby/qtruby.h
/usr/include/qtruby/smokeruby.h
/usr/include/qtruby/marshall_types.h
/usr/share/
/usr/share/qtruby4/
/usr/share/qtruby4/cmake/
/usr/share/qtruby4/cmake/QtRuby4Config.cmake
/usr/share/qtruby4/cmake/QtRuby4Export-none.cmake
/usr/share/qtruby4/cmake/QtRuby4Export.cmake
/usr/share/doc/
/usr/share/doc/libqtruby4shared-dev/
/usr/share/doc/libqtruby4shared-dev/copyright
/usr/lib/libqtruby4shared.so
/usr/share/doc/libqtruby4shared-dev/changelog.Debian.gz