On Jul 10, 2006, at 2:57 AM, Martin Percossi wrote:

Hi, I'm trying to build HSQL, in order to use HaskellDb. The base directory (i.e. HSQL) builds ok, as per instructions, but the PostgreSQL directory fails with the error message:

Setup.lhs:17:71: Couldn't match `PackageDescription' against `LocalBuildInfo' Expected type: Args -> ConfigFlags -> LocalBuildInfo -> IO ExitCode Inferred type: [String] -> ConfigFlags -> PackageDescription -> LocalBuildInfo -> IO ExitCode In the `postConf' field of a record In the record update: defaultUserHooks {preConf = preConf, postConf = postConf}

My version of ghc is 6.4.2. My installed packages are (using "ghc-pkg list"): Cabal-1.0, (Cabal-1.1.4), GLUT-2.0, HUnit-1.1, MissingH-0.14.2, OpenGL-2.0, QuickCheck-1.0, base-1.0, (concurrent-1.0), (data-1.0), fgl-5.2, haskell-src-1.0, haskell98-1.0, hsql-1.7, (hssource-1.0), (lang-1.0), mtl-1.0, (net-1.0), network-1.0, parsec-1.0, (posix-1.0), readline-1.0, rts-1.0, stm-1.0, template-haskell-1.0, (text-1.0), unix-1.0, (util-1.0)

Note that I have installed all of these packages, and ghc into my ~/ opt directory, as I don't have root.

Has anyone seen the above error message before? Am I using the incorrect version of Cabal? Any help appreciated.

Hi Martin, that definitely looks like a Cabal version problem. It looks like you have Cabal-1.0 exposed and Cabal-1.1.4 hidden. Can you try reversing that? This should do it: ghc-pkg hide Cabal-1.0 ghc-pkg expose Cabal-1.1.4 /Björn