libghc-rio-doc 0.1.8.0-1build1 (amd64 binary) in ubuntu eoan

 The goal of the rio library is to make it easier to adopt Haskell for writing
 production software. It is intended as a cross between:
  * Collection of well designed, trusted libraries
  * Useful Prelude replacement
  * A set of best practices for writing production quality Haskell code
 .
 This package provides the documentation for a library for the Haskell
 programming language.
 See http://www.haskell.org/ for more information on Haskell.