Version 1.23.1 is available upstream. Please consider updating!
It seems that version 1.23.1 is available upstream, while the latest version in the Gentoo tree is 1.21.1. You think this warning is false? Read more about it here.
Haskell-Source with eXtensions (HSX, haskell-src-exts) is an extension of the
standard haskell-src package, and handles most common syntactic extensions to
Haskell, including:
* Multi-parameter type classes with functional dependencies
* Empty data declarations
* GADTs
* Implicit parameters (ghc and hugs style)
* Template Haskell (broken for 6.4, needs redoing)