Install libghc-newtype-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-newtype-doc
Description:
A typeclass for working with newtypes; documentation
The Newtype typeclass represents the packing and unpacking of a newtype, and allows you to operatate under that newtype with functions such as ala. . 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/newtype
Version: 0.2-9build1
Section: universe/doc