/usr/share/lua/ is in lua-posix 33.4.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/lua/5.1/
/usr/share/lua/5.1/posix/
/usr/share/lua/5.1/posix/_argcheck.lua
/usr/share/lua/5.1/posix/compat.lua
/usr/share/lua/5.1/posix/deprecated.lua
/usr/share/lua/5.1/posix/init.lua
/usr/share/lua/5.1/posix/sys.lua
/usr/share/lua/5.1/posix/util.lua
/usr/share/lua/5.2/
/usr/share/lua/5.2/posix/
/usr/share/lua/5.2/posix/_argcheck.lua
/usr/share/lua/5.2/posix/compat.lua
/usr/share/lua/5.2/posix/deprecated.lua
/usr/share/lua/5.2/posix/init.lua
/usr/share/lua/5.2/posix/sys.lua
/usr/share/lua/5.2/posix/util.lua
/usr/share/lua/5.3/
/usr/share/lua/5.3/posix/
/usr/share/lua/5.3/posix/_argcheck.lua
/usr/share/lua/5.3/posix/compat.lua
/usr/share/lua/5.3/posix/deprecated.lua
/usr/share/lua/5.3/posix/init.lua
/usr/share/lua/5.3/posix/sys.lua
/usr/share/lua/5.3/posix/util.lua