libghc-sendfile-dev 0.7.11.1-2build2 (amd64 binary) in ubuntu hirsute

 This Haskell library exposes zero-copy sendfile functionality in a
 portable way. sendfile is a non standard system call that copies data
 between one file descriptor and another. This library uses the native
 implementations where possible (for example, under Linux or FreeBSD) and
 provides an Haskell replacement in other cases, thus providing a
 portable interface.
 .
 This package provides a library for the Haskell programming language.
 See http://www.haskell.org/ for more information on Haskell.