/usr/share/darktable/lua/ is in darktable 2.0.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/darktable/lua/darktable/
/usr/share/darktable/lua/darktable/debug.lua
/usr/share/darktable/lua/darktable/external/
/usr/share/darktable/lua/darktable/external/pygy_require/
/usr/share/darktable/lua/darktable/external/pygy_require/.gitignore
/usr/share/darktable/lua/darktable/external/pygy_require/README.md
/usr/share/darktable/lua/darktable/external/pygy_require/require.lua
/usr/share/darktable/lua/darktable/external/pygy_require/rockspecs/
/usr/share/darktable/lua/darktable/external/pygy_require/rockspecs/require-0.1.1-1.rockspec
/usr/share/darktable/lua/darktable/external/pygy_require/rockspecs/require-0.1.2-1.rockspec
/usr/share/darktable/lua/darktable/external/pygy_require/rockspecs/require-0.1.3-1.rockspec
/usr/share/darktable/lua/darktable/external/pygy_require/rockspecs/require-0.1.4-1.rockspec
/usr/share/darktable/lua/darktable/external/pygy_require/rockspecs/require-0.1.4-2.rockspec
/usr/share/darktable/lua/darktable/external/pygy_require/rockspecs/require-0.1.4-3.rockspec
/usr/share/darktable/lua/darktable/external/pygy_require/rockspecs/require-0.1.4-4.rockspec
/usr/share/darktable/lua/darktable/external/pygy_require/rockspecs/require-0.1.4-5.rockspec
/usr/share/darktable/lua/darktable/external/pygy_require/rockspecs/require-0.1.5-1.rockspec
/usr/share/darktable/lua/darktable/external/pygy_require/rockspecs/require-0.1.6-1.rockspec
/usr/share/darktable/lua/darktable/external/pygy_require/rockspecs/require-0.1.7-1.rockspec
/usr/share/darktable/lua/darktable/external/pygy_require/rockspecs/require-0.1.7-2.rockspec