libghc-monoid-subclasses-dev 0.4.2.1-2build1 (amd64 binary) in ubuntu zesty

 A hierarchy of subclasses of Monoid together with their instances
 for all data structures from base, containers, and text packages.
 .
 This package provides a library for the Haskell programming language.
 See http://www.haskell.org/ for more information on Haskell.