Have I upgraded my cabal-install?

cabal, haskell, macos

Solution

I had a similar issue after installing the Haskell platform `2012.4.0.0` on OSX. When I ran `cabal install cabal-install`, it ended with:

cabal: ../ghc-7.4.2/lib/cabal-install-1.16.0.2/bin/cabal: does not exist

So I guessed it got its paths mixed up somewhere. However the executable was actually built successfully (check for `~/Library/Haskell/ghc-7.4.2/lib/cabal-install-1.16.0.2/bin/cabal`) and I just copied it from there to `~/Library/Haskell/bin` which is on my path.

Thereafter everything ran OK:

$ which cabal
/Users/luke/Library/Haskell/bin/cabal
$ cabal update
Downloading the latest package list from hackage.haskell.org
$ cabal --version
cabal-install version 1.16.0.2
using version 1.16.0.3 of the Cabal library

Problem

I just installed Haskell from it's official site. After that, following it's quick-start tutorial. I run: ``` cabal update ``` Which shows this message: ``` 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 ``` I run: ``` cabal install cabal-install ``` and check if the update was successful with ``` cabal update ``` The result, it shows me the same message from the start: ``` 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 ``` So, did I upgrade the cabal-install or not? How do I check my cabal's version? Important: I'm using the 64 bits version for Mac OS X.

Original source