/usr/lib/haskell-packages/ is in libghc-fgl-arbitrary-prof 0.2.0.3-1.
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/x86_64-linux-ghc-8.0.2/
/usr/lib/haskell-packages/ghc/lib/x86_64-linux-ghc-8.0.2/fgl-arbitrary-0.2.0.3-4KvjN6mCZPW3d2nUvx8nYO//
/usr/lib/haskell-packages/ghc/lib/x86_64-linux-ghc-8.0.2/fgl-arbitrary-0.2.0.3-4KvjN6mCZPW3d2nUvx8nYO/Data//
/usr/lib/haskell-packages/ghc/lib/x86_64-linux-ghc-8.0.2/fgl-arbitrary-0.2.0.3-4KvjN6mCZPW3d2nUvx8nYO/Data/Graph//
/usr/lib/haskell-packages/ghc/lib/x86_64-linux-ghc-8.0.2/fgl-arbitrary-0.2.0.3-4KvjN6mCZPW3d2nUvx8nYO/Data/Graph/Inductive//
/usr/lib/haskell-packages/ghc/lib/x86_64-linux-ghc-8.0.2/fgl-arbitrary-0.2.0.3-4KvjN6mCZPW3d2nUvx8nYO/Data/Graph/Inductive/Arbitrary.p_hi
/usr/lib/haskell-packages/ghc/lib/x86_64-linux-ghc-8.0.2/fgl-arbitrary-0.2.0.3-4KvjN6mCZPW3d2nUvx8nYO/libHSfgl-arbitrary-0.2.0.3-4KvjN6mCZPW3d2nUvx8nYO_p.a