Am 27.09.2010 13:44, schrieb Christian Maeder:
Am 27.09.2010 13:31, schrieb Daniel Fischer:
On Monday 27 September 2010 12:58:08, Christian Maeder wrote:
I've tried to install HTTP (for cabal-install) and get the following error:
Configuring HTTP-4000.0.9... Setup: At least the following dependencies are missing: base ==3.*
What is the problem? The Build-depends of HTTP's cabal file look correct (and fulfilled): Build-depends: base >= 3, array, old-time, bytestring
The HTTP.cabal file is not correct! Build-depends: base >= 2 && < 4, network, parsec, mtl
Changing "< 4" to "< 5" works for the HTTP package (which is buggy anyway http://hackage.haskell.org/trac/ghc/ticket/4251). But adjusting cabal-install.cabal is not enough. C. [17 of 40] Compiling Distribution.Client.IndexUtils ( Distribution/Client/IndexUtils.hs, dist/build/cabal/cabal-tmp/Distribution/Client/IndexUtils.o ) Distribution/Client/IndexUtils.hs:80:9: Couldn't match expected type `Maybe InstalledPackageIndex.PackageIndex' with actual type `InstalledPackageIndex.PackageIndex' Expected type: IO (Maybe InstalledPackageIndex.PackageIndex) Actual type: IO InstalledPackageIndex.PackageIndex In the second argument of `fmap', namely `(Configure.getInstalledPackages verbosity comp packageDbs conf)' In the expression: fmap (fmap convert) (Configure.getInstalledPackages verbosity comp packageDbs conf)