cant find module PrelPtr

[Chris Moline]

hi i am learning to use green card. when i try to compile the
preprocessed haskell file i get the error message

ghc-5.04.2: chasing modules from: main.hs
ghc-5.04.2: can't find module `PrelPtr' (while processing
"/usr/local/lib/green-card/StdDIS.hs")

i am using green-card 2.05 and ghc 5.04.2 on freebsd 4.7. what can i do
to fix this?

chris