/usr/lib/hugs/ is in libhugs-hgl-bundled 98.200609.21-5.3ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/hugs/packages/
/usr/lib/hugs/packages/HGL/
/usr/lib/hugs/packages/HGL/Graphics/
/usr/lib/hugs/packages/HGL/Graphics/HGL/
/usr/lib/hugs/packages/HGL/Graphics/HGL.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Core.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Draw/
/usr/lib/hugs/packages/HGL/Graphics/HGL/Draw.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Draw/Brush.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Draw/Font.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Draw/Monad.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Draw/Pen.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Draw/Picture.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Draw/Region.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Draw/Text.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Internals/
/usr/lib/hugs/packages/HGL/Graphics/HGL/Internals/Draw.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Internals/Event.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Internals/Events.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Internals/Flag.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Internals/Types.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Internals/Utilities.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Key.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Run.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Units.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Utils.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/Window.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/X11/
/usr/lib/hugs/packages/HGL/Graphics/HGL/X11/DC.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/X11/Display.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/X11/Timer.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/X11/Types.hs
/usr/lib/hugs/packages/HGL/Graphics/HGL/X11/Window.hs
/usr/lib/hugs/packages/HGL/Graphics/SOE.hs
/usr/lib/hugs/packages/HGL/Paths_HGL.hs