Resolving dependencies...
cabal: Could not resolve dependencies:
trying: eddie-1.0.0 (user goal)
trying: classy-prelude-0.12.0 (dependency of eddie-1.0.0)
next goal: transformers (dependency of classy-prelude-0.12.0)
rejecting: transformers-0.3.0.0/installed-16a... (conflict: mtl =>
transformers==0.4.*)
trying: transformers-0.4.3.0
trying: hint-0.4.2.3 (dependency of eddie-1.0.0)
next goal: ghc (dependency of hint-0.4.2.3)
rejecting: ghc-7.8.3/installed-4df... (conflict: transformers==0.4.3.0, ghc =>
transformers==0.3.0.0/installed-16a...)
Backjump limit reached (change with --max-backjumps).