[arch-haskell] What does "failed to finalize package" mean?

I'm trying to add gtk2hs-buildtools and am getting that error $ cblrepo add gtk2hs-buildtools,0.12.5.2 $ cblrepo pkgbuild --ghc-version 7.8.2-1 Failed to finalize package: gtk2hs-buildtools In digging into the source, it looks like this means a dependency was not able to be found. But all the things that gtk2hs-buildtools depends on are provided by ghc, so I'm a bit at a loss. Any idea what is going on? Thanks, Rich