Install libghc-monadlib-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-monadlib-doc
Description:
collection of monad transformers; documentation
A collection of monad transformers. . 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://wiki.github.com/yav/monadlib
Version: 3.7.3-3build1
Section: universe/doc