GHC non-standard interface file location problem

[Bernd Holzmüller]

Hi all,

while compiling a file select.hs ghc said:

 select.hs:1:
    Could not find interface file for `Concurrent'
    in the directories ./*.hi
                      
c:/programme/haskell/ghc-4.08/lib/imports/std/*.hi

can someone tell me why ghc does not find the interface files for the
concurrency library (or any of the other non-standard libraries) or how
to tell ghc, where this library sits? Is there any GHC INCLUDE path to
be set? I am using ghc 4.08 on a Windows NT machine.

Thanks,
Bernd Holzmüller