Install libghc-simple-sendfile-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-simple-sendfile-doc
Description:
Cross platform library for the sendfile system call; documentation
Cross platform library for the sendfile system call. This library tries to call minimum system calls which are the bottleneck of web servers. . 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/simple-sendfile
Version: 0.2.26-1
Section: universe/doc