/usr/lib/ is in libhugs-quickcheck-bundled 98.200609.21-5.3ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/hugs/
/usr/lib/hugs/packages/
/usr/lib/hugs/packages/QuickCheck/
/usr/lib/hugs/packages/QuickCheck/Test/
/usr/lib/hugs/packages/QuickCheck/Test/QuickCheck.hs
/usr/lib/hugs/packages/QuickCheck/Test/QuickCheck/
/usr/lib/hugs/packages/QuickCheck/Test/QuickCheck/Utils.hs
/usr/lib/hugs/packages/QuickCheck/Test/QuickCheck/Poly.hs
/usr/lib/hugs/packages/QuickCheck/Test/QuickCheck/Batch.hs
/usr/lib/hugs/packages/QuickCheck/Debug/
/usr/lib/hugs/packages/QuickCheck/Debug/QuickCheck.hs
/usr/lib/hugs/packages/QuickCheck/Debug/QuickCheck/
/usr/lib/hugs/packages/QuickCheck/Debug/QuickCheck/Utils.hs
/usr/lib/hugs/packages/QuickCheck/Debug/QuickCheck/Poly.hs
/usr/lib/hugs/packages/QuickCheck/Debug/QuickCheck/Batch.hs
/usr/lib/hugs/packages/QuickCheck/Paths_QuickCheck.hs