Re: [Haskell-beginners] Failure to install cabal-install.

On Mon, Feb 24, 2014 at 2:30 PM, Derek Mahar wrote:

On Mon, Feb 24, 2014 at 1:20 PM, Derek Mahar wrote:

...

[dmahar@dmahar haskell-platform-2013.2.0.0]$ cabal update Downloading the latest package list from hackage.haskell.org Note: there is a new version of cabal-install available. To upgrade, run: cabal install cabal-install [dmahar@dmahar haskell-platform-2013.2.0.0]$ cabal install cabal-install Resolving dependencies... Configuring HTTP-4000.2.11... Building HTTP-4000.2.11... Preprocessing library HTTP-4000.2.11...

Network/Stream.hs:35:8: Could not find module `Control.Monad.Error' There are files missing in the `mtl-2.1.2' package, try running 'ghc-pkg check'. Use -v to see a list of the files searched for. Failed to install HTTP-4000.2.11 cabal: Error: some packages failed to install: HTTP-4000.2.11 failed during the building phase. The exception was: ExitFailure 1 cabal-install-1.18.0.2 depends on HTTP-4000.2.11 which failed to install.

'ghc-pkg -v check' reports that my Haskell environment is missing many files and that many of its packages are broken. See the attached output of 'ghc-pkg -v check'.

I abandoned the idea of fixing the Haskell Platform on my Red Hat Enterprise Linux 6 workstation and instead installed Ubuntu 13.10 in a virtual machine in VirtualBox and installed the much more recent Haskell Platform packages from the Ubuntu repository. Derek