Install libghc-happstack-server-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-happstack-server-dev
Description:
Happstack web framework, HTTP server
Happstack is a Haskell web framework, designed so that developers can prototype quickly, deploy painlessly, scale massively, operate reliably, and change easily. It supports GNU/Linux, OS X, FreeBSD, and Windows environments. . Happstack provides you with all the components you need to build and deploy your application, which is completely self-contained. Particularly, Happstack provides the application with a distributed and persistent data storage layer, capable to interact with the application itself directly in terms of Haskell data structures. . Happstack-server contains the HTTP server itself. . This package provides a library for the Haskell programming language. See http://www.haskell.org/ for more information on Haskell.
Homepage: http://happstack.com
Version: 7.4.6.4-1build4
Section: universe/haskell