Package can't be installed with transformers-0.2.2.0 and GHC 7.2.2
bjpe opened this issue · comments
Trying to install contravariant using transformers-0.2.2.0 and GHC 7.2.2 I get the following error message:
Configuring contravariant-0.4.3...
Building contravariant-0.4.3...
Preprocessing library contravariant-0.4.3...
[1 of 3] Compiling Data.Functor.Contravariant ( Data/Functor/Contravariant.hs, dist/build/Data/Functor/Contravariant.o )
Data/Functor/Contravariant.hs:49:1:
transformers-0.2.2.0:Data.Functor.Product can't be safely imported! The module itself isn't safe.
Failed to install contravariant-0.4.3
@dag is chasing down a few similar issues with regards to older versions of tagged as well.
Great, thanks!