Install libghc-vector-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-vector-doc
Description:
Efficient Arrays for Haskell; documentation
An efficient implementation of Int-indexed arrays (both mutable and immutable), with a powerful loop fusion optimization framework. . This package provides the documentation for a library for the Haskell programming language. See http://www.haskell.org/ for more information on Haskell.
Homepage: https://github.com/haskell/vector
Version: 0.12.0.1-2build1
Section: universe/doc