Install libghc-contravariant-prof by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-contravariant-prof
Description:
Contravariant functors; profiling libraries
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.
Homepage: http://github.com/ekmett/contravariant/
Version: 1.4-3build2
Section: universe/haskell