/usr/lib/haskell-packages/ is in libghc-data-accessor-mtl-prof 0.2.0.3-3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/haskell-packages/ghc/
/usr/lib/haskell-packages/ghc/lib/
/usr/lib/haskell-packages/ghc/lib/data-accessor-mtl-0.2.0.3/
/usr/lib/haskell-packages/ghc/lib/data-accessor-mtl-0.2.0.3/ghc-7.6.3/
/usr/lib/haskell-packages/ghc/lib/data-accessor-mtl-0.2.0.3/ghc-7.6.3/libHSdata-accessor-mtl-0.2.0.3_p.a
/usr/lib/haskell-packages/ghc/lib/data-accessor-mtl-0.2.0.3/ghc-7.6.3/Data/
/usr/lib/haskell-packages/ghc/lib/data-accessor-mtl-0.2.0.3/ghc-7.6.3/Data/Accessor/
/usr/lib/haskell-packages/ghc/lib/data-accessor-mtl-0.2.0.3/ghc-7.6.3/Data/Accessor/Monad/
/usr/lib/haskell-packages/ghc/lib/data-accessor-mtl-0.2.0.3/ghc-7.6.3/Data/Accessor/Monad/MTL/
/usr/lib/haskell-packages/ghc/lib/data-accessor-mtl-0.2.0.3/ghc-7.6.3/Data/Accessor/Monad/MTL/State.p_hi