Huh. What OS?

Could this be an issue wth your path?

Failing that
Try
>cabal update ; cabal install happy ; cabal alex

Unless there's some reason you can't use cabal-install?

On Thursday, August 22, 2013, Simon Peyton-Jones wrote:

>  Urk. The Haskell Platform claims to include Happy and Alex.
> http://www.haskell.org/platform/contents.html****
>
> ** **
>
> But 2013.2.0.0 doesn’t.   Is that intentional?****
>
> ** **
>
> That’s a big problem for people using HP to build GHC.  I’m installing
> 2012.4.0.0 in the hope that it does.  No, nor does 2012.2****
>
> ** **
>
> Am I just being stupid here?****
>
> ** **
>
> Simon****
>
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