Install libghc-html-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-html-doc
Description:
Haskell html library for GHC; documentation
This package provides the documentation for a library for the Haskell programming language. . This library provides combinators for constructing HTML documents.
Homepage: http://hackage.haskell.org/package/html
Version: 1.0.1.2-13build1
Section: universe/doc