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 (global constraint requires
==1.2.12.6)
trying: yesod-bin-1.2.12.6
trying: base-4.8.1.0/installed-4f7... (dependency of yesod-bin-1.2.12.6)
trying: transformers-0.4.2.0/installed-21d... (dependency of
yesod-bin-1.2.12.6)
next goal: optparse-applicative (dependency of yesod-bin-1.2.12.6)
rejecting: optparse-applicative-0.12.0.0, 0.11.0.2, 0.11.0.1, 0.11.0, 0.10.0
(conflict: yesod-bin => optparse-applicative>=0.5 && <=0.9.1.1)
rejecting: optparse-applicative-0.9.1.1, 0.9.1, 0.9.0 (conflict:
base==4.8.1.0/installed-4f7..., optparse-applicative => base>=4 && <4.8)
rejecting: optparse-applicative-0.8.1, 0.8.0.1, 0.8.0, 0.7.0.2, 0.7.0.1,
0.7.0, 0.6.0, 0.5.2.1, 0.5.2, 0.5.1, 0.5.0 (conflict:
transformers==0.4.2.0/installed-21d..., optparse-applicative =>
transformers>=0.2 && <0.4)
rejecting: optparse-applicative-0.4.3, 0.4.2, 0.4.1, 0.4.0, 0.3.2, 0.3.1,
0.3.0, 0.2.0, 0.1.1, 0.1.0, 0.0.1 (conflict: yesod-bin =>
optparse-applicative>=0.5 && <=0.9.1.1)
Backjump limit reached (change with --max-backjumps).