cabal install QuickCheck

Duncan Coutts duncan.coutts at
Mon Jan 10 19:27:01 CET 2011

On 10 January 2011 15:42, Christian Maeder <Christian.Maeder at> wrote:
> Am 08.01.2011 23:59, schrieb Thomas DuBuisson:
>> Cabal has this really ugly hack called "preferred versions".  This is
>> how you get QC 1 (vs 2) and Parsec 2 (vs 3) when you don't specify.
>> To get around this just add a constraint:
>> cabal install 'QuickCheck >= 2'
> Right, the "preferred version" for QuickCheck should be updated to
> version 2, because the haskell platform happened to switch from QC1 to
> QC2 some time ago.

Ah, good point. Fixed. (For some reason I thought I'd done it already,
but apparently not)


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