/usr/ is in libaqsis-dev 1.8.2-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/share/doc/libaqsis-dev/
/usr/share/
/usr/lib/
/usr/include/
/usr/include/aqsis/
/usr/include/aqsis/ri/
/usr/include/aqsis/ri/slo.h
/usr/include/aqsis/ri/ri.h
/usr/include/aqsis/ri/rif.h
/usr/include/aqsis/ri/shadeop.h
/usr/include/aqsis/ri/slx.h
/usr/include/aqsis/ri/ritypes.h
/usr/include/aqsis/ri/ndspy.h
/usr/include/aqsis/aqsis.h
/usr/include/aqsis/config.h
/usr/include/aqsis/version.h
/usr/include/aqsis/inttype.h
/usr/share/doc/libaqsis-dev/copyright
/usr/lib/libaqsis_riutil.so
/usr/lib/libaqsis_slxargs.so
/usr/lib/libaqsis_tex.so
/usr/lib/libaqsis_math.so
/usr/lib/libaqsis_slcomp.so
/usr/lib/libaqsis_shadervm.so
/usr/lib/libaqsis_core.so
/usr/lib/libaqsis_ri2rib.so
/usr/lib/libaqsis_util.so
/usr/share/doc/libaqsis-dev/changelog.Debian.gz