"cabal install cabal-install" is not working for me. I am not the first to find this problem; it is mentioned here:

"Notice, that in some cases (OS X, especially) the new cabal-install might not be installed on top of the previous one, and the old cabal-install must be replaced manually"

I don't know how to manually replace Cabal. The closest thing I could find to instructions for that were here, but I don't understand them.

The Haskell Platform installer is what installed Cabal for me. I have not found how to undo that, nor how to install Cabal in any other fashion. Running the Haskell Platform installer again seems dangerous, potentially conflicting with its earlier work.

A likely unnecessary shell transcript demonstrating the problem appears below.

I am running OS X 10.9 on a MacBook Pro, of which the decision to purchase I regret more daily.

Thank you.

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When I try to update cabal, it looks like it works:

jefferys-mbp:~ jbb$ cabal install cabal-install

Resolving dependencies...

Configuring cabal-install-1.20.0.3...

Building cabal-install-1.20.0.3...

Installed cabal-install-1.20.0.3

Updating documentation index /Users/jbb/Library/Haskell/share/doc/index.html

But the version number exhibits no change:

jefferys-mbp:~ jbb$ cabal --version

cabal-install version 1.18.0.5

using version 1.18.1.4 of the Cabal library