Install libghc-mbox-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-mbox-doc
Description:
mbox reader/writer library; documentation
It reads and writes standard mailbox (mboxrd) files. . 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/mbox
Version: 0.3.4-1
Section: universe/doc