libghc-contravariant-prof 1.3.3-1build1 (amd64 binary) in ubuntu xenial

 This packages provides a type class for contravariant functors, i.e. those with
 a method contramap :: (a -> b) -> f b -> f a.
 .
 This package provides a library for the Haskell programming language, compiled
 for profiling. See http://www.haskell.org/ for more information on Haskell.