[Haskell-cafe] How to cabal fetch mtl==2.0.0.0?

[Iain Alexander]

"Albert Y. C. Lai" <trebla at vex.net> suggested
> cabal fetch mtl-2.0.0.0

C:\Documents and Settings\Iain Alexander>cabal fetch mtl-2.0.0.0
Resolving dependencies...
cabal: internal error: could not construct a valid install plan.
The proposed (invalid) plan contained the following problems:
The following packages are involved in a dependency cycle transformers-0.2.2.0,
special-functors-1.0, mtl-2.0.0.0
-- 
Iain Alexander      ia at stryx.demon.co.uk