from http://aur.archlinux.org/packages.php?ID=39703 tzok wrote: In the PKGBUILD there are more broken dependencies than haskell-time. It is because they use equality sign '=' which requires that exactly this version is installed and no other. With new ghc in [extra] repository, those packages have higher version numbers. I have modified PKGBUILD and changed all '=' into '>=' in dependencies section which helped. But there was also one issue with haskell-parsec being in version 3.1.1 while arbtt.cabal explicitly required version 2.*. I have modified it too and then successfully compiled arbtt. It is working now :). Here is my modified PKGBUILD: http://pastebin.com/egaA41Hd --- If you no longer wish to receive notifications about this package, please go the the above package page and click the UnNotify button.