[arch-haskell] pacman output for archhaskell packages

When (re)installing ArchHaskell packages, pacman produces some unusual and typically uninformative output compared to for non-haskell packages. I mean, things like: Reading package info from stdin ... done. and, worse, there is often an "error" when upgrading a package "command failed to execute correctly", which appears to be harmless but is confronting nevertheless. Would it be possible to engineer the ArchHaskell PKGBUILDs so as to suppress these messages?