[Haskell-beginners] Happstack dependency problems

Patrick Lynch kmandpjlynch at verizon.net
Wed Apr 6 15:22:02 CEST 2011

Good morning,
The Cabal User manual link is: http://www.haskell.org/cabal/release/cabal-latest/doc/users-guide/
I'm right behind you, I'm working on Yesod on a Windows Vista PC.
Wish us both luck
  ----- Original Message ----- 
  From: Tom Murphy 
  To: Antoine Latter 
  Cc: beginners at haskell.org ; Daniel Fischer 
  Sent: Wednesday, April 06, 2011 12:40 AM
  Subject: Re: [Haskell-beginners] Happstack dependency problems

    It requires unix-compat to build. What does "cabal install
    unix-compat" give you?

  The same error. But...

    If that's what's breaking you can try "cabal install
    unix-compat-" and then "cabal install happstack-util". Version appears to be the most recent version of unix-compat that
    doesn't specify version bounds on the unix package, which is what
    you're having trouble with.

  This worked, then "cabal install happstack" worked perfectly(!) 
       Can anyone point me to a tutorial which explains basics of cabal? I'm trying to navigate it, without understanding version bounds, or really anything related to how cabal handles versions of dependencies.

  Thank you for the help!


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