Install libghc-hex-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-hex-doc
Description:
Convert strings into hexadecimal and back.; documentation
This package provides conversion functions between bytestrings and their hexademical representation. . 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/hex
Version: 0.1.2-4build1
Section: universe/doc