/usr/lib/hugs/ is in libhugs-cabal-bundled 98.200609.21-5.3ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/hugs/packages/
/usr/lib/hugs/packages/Cabal/
/usr/lib/hugs/packages/Cabal/Distribution/
/usr/lib/hugs/packages/Cabal/Distribution/Compat/
/usr/lib/hugs/packages/Cabal/Distribution/Compat/Directory.hs
/usr/lib/hugs/packages/Cabal/Distribution/Compat/Exception.hs
/usr/lib/hugs/packages/Cabal/Distribution/Compat/FilePath.hs
/usr/lib/hugs/packages/Cabal/Distribution/Compat/Map.hs
/usr/lib/hugs/packages/Cabal/Distribution/Compat/RawSystem.hs
/usr/lib/hugs/packages/Cabal/Distribution/Compat/ReadP.hs
/usr/lib/hugs/packages/Cabal/Distribution/Compiler.hs
/usr/lib/hugs/packages/Cabal/Distribution/Extension.hs
/usr/lib/hugs/packages/Cabal/Distribution/GetOpt.hs
/usr/lib/hugs/packages/Cabal/Distribution/InstalledPackageInfo.hs
/usr/lib/hugs/packages/Cabal/Distribution/License.hs
/usr/lib/hugs/packages/Cabal/Distribution/Make.hs
/usr/lib/hugs/packages/Cabal/Distribution/Package.hs
/usr/lib/hugs/packages/Cabal/Distribution/PackageDescription.hs
/usr/lib/hugs/packages/Cabal/Distribution/ParseUtils.hs
/usr/lib/hugs/packages/Cabal/Distribution/PreProcess/
/usr/lib/hugs/packages/Cabal/Distribution/PreProcess.hs
/usr/lib/hugs/packages/Cabal/Distribution/PreProcess/Unlit.hs
/usr/lib/hugs/packages/Cabal/Distribution/Program.hs
/usr/lib/hugs/packages/Cabal/Distribution/Setup.hs
/usr/lib/hugs/packages/Cabal/Distribution/Simple/
/usr/lib/hugs/packages/Cabal/Distribution/Simple.hs
/usr/lib/hugs/packages/Cabal/Distribution/Simple/Build.hs
/usr/lib/hugs/packages/Cabal/Distribution/Simple/Configure.hs
/usr/lib/hugs/packages/Cabal/Distribution/Simple/GHC.hs
/usr/lib/hugs/packages/Cabal/Distribution/Simple/GHCPackageConfig.hs
/usr/lib/hugs/packages/Cabal/Distribution/Simple/Hugs.hs
/usr/lib/hugs/packages/Cabal/Distribution/Simple/Install.hs
/usr/lib/hugs/packages/Cabal/Distribution/Simple/JHC.hs
/usr/lib/hugs/packages/Cabal/Distribution/Simple/LocalBuildInfo.hs
/usr/lib/hugs/packages/Cabal/Distribution/Simple/NHC.hs
/usr/lib/hugs/packages/Cabal/Distribution/Simple/Register.hs
/usr/lib/hugs/packages/Cabal/Distribution/Simple/SrcDist.hs
/usr/lib/hugs/packages/Cabal/Distribution/Simple/Utils.hs
/usr/lib/hugs/packages/Cabal/Distribution/Version.hs
/usr/lib/hugs/packages/Cabal/Language/
/usr/lib/hugs/packages/Cabal/Language/Haskell/
/usr/lib/hugs/packages/Cabal/Language/Haskell/Extension.hs
/usr/lib/hugs/packages/Cabal/Paths_Cabal.hs
/usr/lib/hugs/packages/Cabal/copyright