On 12-06-27 11:29 AM, Sjoerd Visscher wrote:
I tried to install reactive-banana. This failed due to a dependency conflict, and then I noticed there was a newer version of reactive-banana. So I did cabal update, and tried to install again. But whatever I do, cabal keeps trying to install fclabels, but fclabels is no longer a dependency of reactive-banana-0.6.0.0! How can I let cabal forget this dependency?
In http://hackage.haskell.org/packages/archive/reactive-banana/0.6.0.0/reactive... : if flag(UseExtensions) extensions: TypeFamilies, GADTs, MultiParamTypeClasses, BangPatterns, TupleSections, EmptyDataDecls build-depends: QuickCheck >= 1.2 && < 2.5, fclabels == 1.1.*, unordered-containers >= 0.2.1.0 && < 0.3, hashable == 1.1.* CPP-options: -DUseExtensions Recall that the semantics of "if flag" is like Prolog not Pascal: if the packages under build-depends could be installed, then UseExtensions is set to true. Unless you manually override.