[Haskell-cafe] Some help needed to start Haskell with Yi

[Henning Thielemann]

On Thu, 19 Nov 2009, Daniel Fischer wrote:

>> A separate package for that orphan instance would be the best solution.
>
> I'm not sure that's really better. With a separate package, you'd have dependencies
> packageY, orphanInstance.
> When a new version of packageY with the instance is uploaded, things break in the same
> way. The fix is easy either way, delete the dependency orphanInstance or delete the orphan
> instance, but with a separate package, that stays around polluting hackage - or is there
> now a way to remove packages from hackage swiftly?

This interim package can be modified in a way such that it exports an 
empty module for the versions of the base package that define the instance 
themselve.