On Mon, Nov 19, 2012 at 2:55 PM, Greg Fitzgerald
cabal install -v cabal-install
Not sure if you're running into this one, but a configuration that wasn't working for me:
1) Install Haskell Platform 2) Install GHC 7.6.1 3) cabal install cabal-install
As I recall, the error had something to do with a Cabal-generated 'Paths' file assuming the Prelude exported 'catch'. It was affecting a bunch of other packages too, which forced me to upgrade cabal-install.
To get things working, I had to boot GHC 7.6 from my system PATH, upgrade cabal-install using GHC 7.4, and then put 7.6 back in the system path. After doing that, everything has worked well with GHC 7.6.
The issue is that cabal-install-1.16.0.1 is broken on Windows. We have a new, fixed cabal-install-1.16.0.2 out, but if you were unlucky enough to install the broken one you need to delete that binary and install cabal-install again (either by using the bootstrap.sh script in the cabal-install repo or by some other means).