Install libghc-mmorph-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-mmorph-doc
Description:
monad morphisms; documentation
This library provides monad morphism utilities, most commonly used for manipulating monad transformer stacks. . This package provides the documentation for a library for the Haskell programming language. See http://www.haskell.org/ for more information on Haskell.
Homepage: http://hackage.haskell.org/package/mmorph
Version: 1.0.9-1
Section: universe/doc