From: Jeff Wheeler <jeff@nokrev.com>

On Wed, Mar 24, 2010 at 2:27 PM, Colin Paul Adams <colin@colina.demon.co.uk> wrote:

...

Hm. I edited the cabal file to allow >= 2.3 && < 2.5 and it just compiled. Wouldn't this work with 6.12 also?

Unfortunately not. Making that change yields:

yi$ cabal install Resolving dependencies... cabal: dependencies conflict: ghc-6.12.1 requires template-haskell ==2.4.0.0 however template-haskell-2.4.0.0 was excluded because data-accessor-template-0.2.1.3 requires template-haskell >=2.2 && <2.4

data-accessor-template needs to be compiled with the -ftemplate_2_4 flag, which Cabal doesn't try here, for some reason.

Will it work if you set data-accessor-template < 0.2.1.3 in the .cabal file? I think that version is acceptable to both ghc-6.10 and 6.12. John