Install libghc-wai-extra-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-wai-extra-doc
Description:
some basic WAI handlers and middleware; documentation
wai is a common protocol for communication between web aplications and web servers. . This library provides some common features not tied to a particular web application or web server. . 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://github.com/yesodweb/wai
Version: 3.0.21.0-1build1
Section: universe/doc