[Haskell-cafe] How do I fix this error message?
mvanier42 at gmail.com
Fri Sep 4 17:03:47 EDT 2009
I ran into this error when recompiling some code I hadn't worked on in a
Could not find module `Control.Monad.Error':
it was found in multiple packages: monads-fd-0.0.0.1 mtl-220.127.116.11
I gather that monads-fd is supposed to be a replacement for mtl, but I
have both of them (mtl from the normal GHC 6.10.4 install, monads-fd
from cabal). I don't really care which one I use, though mtl has been
fine in the past. In the past, I had to manually uninstall cabal
packages that used incompatible libraries. Is this still the case?
More information about the Haskell-Cafe