Installing packages using cabal fails on Haskell Platform 2011.2.0 on Mac OS X

[mvanier]

I just installed the Haskell Platform (2011.2.0) on my Mac. I've done this on every previous release with few or no problems. Now, however, trying to use cabal to install a package fails for almost all packages. I'm attaching the result of trying to install the latest version of cabal-install, but the same kind of errors result from installing many other packages (agda, haskeline, xmobar, etc.).

[dons]

Errors due to Cabal-1.8.0.6 dependencies? What's the output of ghc-pkg ? and ghc-pkg check

[mvanier]

Output of ghc-pkg check

[mvanier]

I've attached the output of ghc-pkg check.

[MtnViewMark]

My suspicion is that the "cabal" command on your $PATH is old cabal, not new. If you run "cabal --version" you should see:

>: cabal --version
cabal-install version 0.10.2
using version 1.10.1.0 of the Cabal library 

If you don't see that, try running "/usr/bin/cabal --version" -- and I suspect that will show the newer one.

In this case, if you have nothing precious there, just "rm -rf ~/.cabal" -- and ensure there is no cabal executable (or symlink) lurking in ~/bin or /usr/local/bin. Finally, on the next execution of cabal, you'll get new cabal, and the new package install locations for --user (under ~/Library/Haskell)

[mvanier]

You're correct -- that was the problem and your fix works. Thanks!

[mvanier]

One more thing: I had to delete my ~/.ghc directory for everything to work properly.