Install libghc-websockets-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-websockets-dev
Description:
write WebSocket-capable servers
Provides a sensible, clean and simple way to write WebSocket-capable servers in Haskell. . This package provides a library for the Haskell programming language. See http://www.haskell.org/ for more information on Haskell.
Homepage: http://jaspervdj.be/websockets
Version: 0.10.0.0-1build4
Section: universe/haskell