Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: yesod-examples (user goal)
rejecting: yesod-examples-0.9.0.1, yesod-examples-0.9.0,
yesod-examples-0.8.0.3, yesod-examples-0.8.0.2, yesod-examples-0.8.0.1,
yesod-examples-0.8.0, yesod-examples-0.7.0.1, yesod-examples-0.7.0,
yesod-examples-0.6.1, yesod-examples-0.6.0.2, yesod-examples-0.6.0.1,
yesod-examples-0.6.0, yesod-examples-0.5.1, yesod-examples-0.5.0.2,
yesod-examples-0.5.0.1 (constraint from user target requires ==0.5.0)
trying: yesod-examples-0.5.0
trying: mtl-2.2.1 (dependency of exceptions-0.8.3)
next goal: transformers (dependency of yesod-examples-0.5.0)
rejecting: transformers-0.5.2.0/installed-0.5..., transformers-0.5.2.0,
transformers-0.5.1.0, transformers-0.5.0.1, transformers-0.5.0.0,
transformers-0.4.3.0, transformers-0.4.2.0, transformers-0.4.1.0,
transformers-0.3.0.0 (conflict: yesod-examples => transformers>=0.2.1 && <0.3)
rejecting: transformers-0.2.2.1, transformers-0.2.1.0 (conflict: mtl =>
transformers>=0.4 && <0.6)
rejecting: transformers-0.2.0.0, transformers-0.1.4.0, transformers-0.1.3.0,
transformers-0.1.1.0, transformers-0.1.0.1, transformers-0.0.1.0,
transformers-0.0.0.0, transformers-0.5.0.2, transformers-0.4.0.0 (conflict:
yesod-examples => transformers>=0.2.1 && <0.3)
rejecting: transformers-0.2.2.0 (conflict: mtl => transformers>=0.4 && <0.6)
rejecting: transformers-0.1.0.0 (conflict: yesod-examples =>
transformers>=0.2.1 && <0.3)
Backjump limit reached (currently 2000, change with --max-backjumps or try to
run with --reorder-goals).