Re: MTL vs Transformers. Any status update?

On Sat, 28 Nov 2009, Thomas DuBuisson wrote:

On Sat, Nov 28, 2009 at 8:56 AM, Ross Paterson wrote:

...

The problem is that transformers and mtl use the same module names, such as Control.Monad.Identity.  Unless one of these packages is hidden, people using ghci or ghc --make will have problems.

I've happily used LANGUAGE PackageImports to handle transformer / mtl conflicts. I don't see why either one must change their module names and there are obvious disadvantages.

This PRAGMA is only available in GHC, is it?