Bad interface file error with GHC RC2

[Simon Marlow]

Krasimir Angelov wrote:
> Building with -package-name comlib-0.1 helps. I saw that Cabal from
> HEAD is passing the full package id to GHC but the version compiled in
> ghc-6.5.20061001 is passing just the package name. Maybe the change
> wasn't merged in GHC-6.6 branch or the bundle wasn't build from the
> actual sources.

I just looked in the Cabal sources from the 6.6 branch:

       let ghcArgs =
                  pkg_conf
               ++ ["-package-name", showPackageId (package pkg_descr) ]

So it certainly passes the entire package ID (including the version) to GHC.  So 
I'm confused!  Could you perhaps have an old Setup binary left in your build tree?

Cheers,
	Simon