Happstack is the Haskell Application Server Stack. It is a scalable framework for developing web applications, similar in purpose to Django, RoR, Turbogears, Grails, Seaside. happstack powers patch-tag.com and gitit.net and you can use it to beat the Arc Challenge. The latest release of happstack is now available in Arch, via AUR, and features a built-in HTTP server, built-in persistant data store, many ways to do templating, a rich EDSL for designing requests and responses, and easy integration with an external database, or webserver.
All the packages are here:
- haskell-happstack-server 0.4.1-1
- haskell-happstack-state 0.4.1-1
- haskell-happstack-ixset 0.4.1-1
- haskell-happstack-data 0.4.1-1
- haskell-happstack-util 0.4.1-1
To get started with happstack, you can work through Real World Happstack.
Arch Linux and Haskell 
Hi,
The package ‘haskell-src-exts’ is present in AUR as ‘haskell-haskell-src-exts’. this is causing failure of installation of hsx ( which ultimately leads to failure of installation of happs-tutorial )
Configuring hsx-0.5.6…
Setup: At least the following dependencies are missing:
haskell-src-exts ==1.0.* && ==1.0.*
The problem is not the package name, but rather the version that HSX requires. hsx requires precisely haskell-src-exts 1.0.*, while Arch provides 1.7.2 http://aur.archlinux.org/packages.php?ID=18129
HSX needs to update first, upstream.