Install libghc-web-routes-hsp-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-web-routes-hsp-doc
Description:
XMLGenerator instance for RouteT monad; documentation
Provides HSP and web-routes integration. . 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/web-routes-hsp
Version: 0.24.6.1-3build5
Section: universe/doc