[Haskell-cafe] library conflicts and how to resolve them

Graham Berks graham at fatlazycat.com
Sun May 6 20:46:59 CEST 2012


$ cabal install persistent
Resolving dependencies...
In order, the following would be installed:
aeson- (reinstall) changes: mtl-2.1.1 ->
persistent- (new package)
cabal: The following packages are likely to be broken by the reinstalls:
Use --force-reinstalls if you want to install anyway.

Any ideas what is going on ? I believe aeson-  is already installed.
And as far as I can tell the build of aeson- doesn't require that specific version of mtl.

Am I missing something ? Is there a way to force ghc to ignore this ??


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