[Haskell-cafe] category-extras clash with transformers

Ivan Lazar Miljenovic ivan.miljenovic at gmail.com
Sat Nov 20 18:05:39 EST 2010

On 21 November 2010 09:59, Tony Morris <tonymorris at gmail.com> wrote:
> Hash: SHA1
> On 21/11/10 08:41, Edward Z. Yang wrote:
>> No, you're not totally screwed; you just need to bug
>> xmonad-contrib and category-extras to fix their code.
>> Edward
> I am wondering if upgrading from 6.12.1 to 6.12.3 will allow me to
> compile xmonad-contrib* and therefore, be ride of the old version of
> mtl and therefore, can install category extras.

No; since xmonad-contrib doesn't have bounds on the version of mtl
being used, cabal-install will take the latest version.  You need to
use --constraint="mtl < 2".

Ivan Lazar Miljenovic
Ivan.Miljenovic at gmail.com

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