[arch-haskell] shared libs problem

Hello, Why some packages give errors and converted to pkgbuilds? hosc and data-binary-ieee75, for example, build fine with cabal here, but not with makepkg -sfi /usr/bin/ld: cannot find -lHSbinary-0.5.0.2-ghc7.0.3 collect2: ld returned 1 exit status Who did you fix that?