OK... I got it to compile... make boot; make; make install. It was that easy. ;-) Now I have a bunch of files residing in /usr/local/bin: ihc.exe /usr/local/lib: HDirect.lhs PointerPrim.dll WideString.hs libHShdirect.a HShdirect.o PointerPrim.hs hslibs-imports libHShdirect_p.a Pointer.lhs WideString.dll libHScom.a /usr/local/lib/hslibs-imports: hdirect /usr/local/lib/hslibs-imports/hdirect: HDirect.hi Pointer.hi PointerPrim.hi WideString.hi HDirect.p_hi Pointer.p_hi PointerPrim.p_hi WideString.p_hi /usr/local/share: AutoPrim.hi ComPrim.hi HDirect.hi SafeArrayPrim.c AutoPrim.hs ComPrim.hs HDirect.lhs StdDispatch.hi AutoPrimSrc.c ComPrimSrc.c HDirect.p_hi StdDispatch.lhs Automation.hi ComServ.hi Pointer.hi StdTypes.hi Automation.lhs ComServ.lhs Pointer.lhs StdTypes.hs ClassFactory.hi Connection.hi Pointer.p_hi TypeLib.hi ClassFactory.lhs Connection.hs PointerPrim.hi TypeLib.hs Com.hi ConnectionPoint.hi PointerPrim.hs WideString.hi Com.lhs ConnectionPoint.lhs PointerPrim.p_hi WideString.hs ComDll.hi EnumInterface.hi PointerSrc.c WideString.p_hi ComDll.lhs EnumInterface.lhs Registry.c WideStringSrc.c ComException.hi ExeServer.hi SafeArray.hi com.pkg ComException.lhs ExeServer.lhs SafeArray.hs hdirect.pkg I use ghc 6.0.1 for Windows (windows installer ditrib downloaded from haskell.org/ghc), which lives in c:/ghc/ghc-6.0.1/. Make install seems to have added the package hdirect to this ghc. The com package is missing... When trying to invoke ghci with -package com it prints out $ ghci -package com c:\ghc\GHC-60~1.1\bin\ghc.exe: unknown package name: com After copying the files above to c:/ghc/ghc-6.0.1/hslibs-imports/hdirect, c:/ghc/ghc-6.0.1/, and c:/ghc/ghc-6.0.1/imports respectively, calling ghci with -package hdirect gives me Loading package base ... linking ... done. Loading package lang ... linking ... done. Loading package hdirect ... linking ... c:/ghc/ghc-6.0.1/HShdirect.o: unknown symbol `___stginit_Word_' c:\ghc\GHC-60~1.1\bin\ghc.exe: panic! (the `impossible' happened, GHC version 6. 0.1): can't load package `hdirect' Please report it as a compiler bug to glasgow-haskell-bugs@haskell.org, or http://sourceforge.net/projects/ghc/. I'm stuck. What is the correct way of integrating hdirect into ghc-6.0.1? Thanks very much, Johannes