[Haskell-cafe] Cabal + yi + alex problem.

John Dorsey haskell at colquitt.org
Wed Jul 30 14:58:26 EDT 2008

> [problems with cabal install yi]

Curious, I tried this out, on a Debian etch box with GHC 6.8.3.

"cabal update ; cabal install yi --global"
complained about needing alex >=2.0.something and <3.

Then "cabal install alex" happily installed alex version 2.2.  Finally,
"cabal install yi --global" worked fine.

Is something amiss with cabal-install?  Shouldn't it have automatically
installed alex?  Or does it only do that with libraries, by design?

For that matter, "ghc-pkg list | grep -i alex" doesn't list anything,
after I cabal-installed it.  How does cabal verify the prerequisite alex
version?  (Or does it?)

I'm enjoying cabal since I've begun using it, but it's still somewhat
opaque to me.

John Dorsey

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