Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: yesod-bin (user goal)
rejecting: yesod-bin-1.4.14, 1.4.13.3, 1.4.13.2, 1.4.13.1, 1.4.13, 1.4.12,
1.4.11, 1.4.10, 1.4.9.2, 1.4.9.1, 1.4.9, 1.4.8, 1.4.7.2, 1.4.7.1, 1.4.7,
1.4.6, 1.4.5.1, 1.4.5, 1.4.4, 1.4.3.11, 1.4.3.10, 1.4.3.9, 1.4.3.7, 1.4.3.6,
1.4.3.5, 1.4.3.4, 1.4.3.3, 1.4.3.2, 1.4.3.1, 1.4.3, 1.4.2, 1.4.1.2, 1.4.1.1,
1.4.1, 1.4.0.9, 1.4.0.8, 1.4.0.7, 1.4.0.6, 1.4.0.5, 1.4.0.4, 1.4.0.3, 1.4.0.2,
1.4.0.1, 1.4.0, 1.2.13, 1.2.12.8, 1.2.12.7, 1.2.12.6, 1.2.12.5, 1.2.12.4,
1.2.12.3, 1.2.12.2, 1.2.12.1, 1.2.12, 1.2.11, 1.2.10.3, 1.2.10.2, 1.2.10.1,
1.2.10, 1.2.9.4, 1.2.9.3, 1.2.9.2, 1.2.9.1, 1.2.9, 1.2.8.1, 1.2.8, 1.2.7.4,
1.2.7.3, 1.2.7.2, 1.2.7.1 (global constraint requires ==1.2.7)
trying: yesod-bin-1.2.7
trying: filesystem-conduit-1.0.0.2 (dependency of yesod-bin-1.2.7)
trying: warp-3.1.9 (dependency of yesod-bin-1.2.7)
trying: http2-1.3.1 (dependency of warp-3.1.9)
trying: aeson-0.10.0.0 (dependency of http2-1.3.1)
trying: mtl-2.2.1 (dependency of aeson-0.10.0.0)
next goal: transformers (dependency of yesod-bin-1.2.7)
rejecting: transformers-0.4.2.0/installed-21d..., 0.4.3.0, 0.4.2.0, 0.4.1.0
(conflict: filesystem-conduit => transformers>=0.2.2 && <0.4)
rejecting: transformers-0.3.0.0, 0.2.2.1, 0.2.2.0 (conflict: mtl =>
transformers==0.4.*)
rejecting: transformers-0.2.1.0, 0.2.0.0, 0.1.4.0, 0.1.3.0, 0.1.1.0, 0.1.0.1,
0.1.0.0, 0.0.1.0, 0.0.0.0, 0.4.0.0 (conflict: filesystem-conduit =>
transformers>=0.2.2 && <0.4)
Backjump limit reached (change with --max-backjumps).