[arch-haskell] Wanted: script for doing chroot clean room package building

Hey guys, So I'm trying to maintain quality in the AUR packages. I need nightly builds of packages to spot changes in deps (e.g. when GHC's core set changes, or when C libs change). To do this, I need a way to instantiate a clean Arch system, install GHC and the other pacman Haskell tools. Anyone got an example of how to do this? -- Don