The downgrade of HaXml to 1.13 allows us to finally build the HAppS web framework in AUR.HAppS is now fully supported in Arch, as you can see.
HApps is a web framework for Haskell, (a la Ruby on Rails),
A web framework for developers to prototype quickly, deploy painlessly, scale massively, operate reliably, and change easily
So bring on the Haskell web apps!