/usr/lib/haskell-packages/ghc/ is in libghc-syb-with-class-instances-text-dev 0.0.1-6+b2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/haskell-packages/ghc/lib/
/usr/lib/haskell-packages/ghc/lib/syb-with-class-instances-text-0.0.1/
/usr/lib/haskell-packages/ghc/lib/syb-with-class-instances-text-0.0.1/ghc-7.6.3/
/usr/lib/haskell-packages/ghc/lib/syb-with-class-instances-text-0.0.1/ghc-7.6.3/libHSsyb-with-class-instances-text-0.0.1.a
/usr/lib/haskell-packages/ghc/lib/syb-with-class-instances-text-0.0.1/ghc-7.6.3/Data/
/usr/lib/haskell-packages/ghc/lib/syb-with-class-instances-text-0.0.1/ghc-7.6.3/Data/Generics/
/usr/lib/haskell-packages/ghc/lib/syb-with-class-instances-text-0.0.1/ghc-7.6.3/Data/Generics/SYB/
/usr/lib/haskell-packages/ghc/lib/syb-with-class-instances-text-0.0.1/ghc-7.6.3/Data/Generics/SYB/WithClass//
/usr/lib/haskell-packages/ghc/lib/syb-with-class-instances-text-0.0.1/ghc-7.6.3/Data/Generics/SYB/WithClass/Instances//
/usr/lib/haskell-packages/ghc/lib/syb-with-class-instances-text-0.0.1/ghc-7.6.3/Data/Generics/SYB/WithClass/Instances/Text.hi
/usr/lib/haskell-packages/ghc/lib/syb-with-class-instances-text-0.0.1/ghc-7.6.3/HSsyb-with-class-instances-text-0.0.1.o