Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: yesod (user goal)
rejecting: yesod-1.4.1.5, 1.4.1.4, 1.4.1.3, 1.4.1.2, 1.4.1.1 (global
constraint requires ==1.4.1)
trying: yesod-1.4.1
trying: aeson-0.9.0.1 (dependency of yesod-1.4.1)
trying: yesod-form-1.4.4.1 (dependency of yesod-1.4.1)
trying: persistent-2.1.6 (dependency of yesod-form-1.4.4.1)
trying: yesod-persistent-1.4.0.2 (dependency of yesod-1.4.1)
next goal: persistent-template (dependency of yesod-persistent-1.4.0.2)
rejecting: persistent-template-2.1.3.3, 2.1.3.2, 2.1.3.1, 2.1.3 (conflict:
aeson==0.9.0.1, persistent-template => aeson>=0.7 && <0.9)
rejecting: persistent-template-2.1.1 (conflict: persistent==2.1.6,
persistent-template => persistent>=2.1 && <2.1.3)
rejecting: persistent-template-2.1.0.1, 2.1 (conflict: aeson==0.9.0.1,
persistent-template => aeson>=0.7 && <0.9)
rejecting: persistent-template-2.0.8, 2.0.7, 2.0.5, 2.0.4, 2.0.3.2, 2.0.3.1,
2.0.3, 2.0.2.2, 2.0.2.1, 2.0.2, 2.0.1.1, 2.0.1, 2.0.0.3, 2.0.0.2, 2.0.0.1,
2.0.0, 1.3.2.2, 1.3.2.1, 1.3.1.4, 1.3.1.3, 1.3.1.2, 1.3.1.1, 1.3.1, 1.3.0,
1.2.0.6, 1.2.0.5, 1.2.0.4, 1.2.0.3, 1.2.0.2, 1.2.0.1, 1.2.0, 1.1.3.1, 1.1.3,
1.1.2.5, 1.1.2.4, 1.1.2.3, 1.1.2.2, 1.1.2.1, 1.1.2, 1.1.1, 1.1.0, 1.0.0.2,
1.0.0.1, 1.0.0, 0.9.0.2, 0.9.0.1, 0.9.0, 0.8.2, 0.8.1.2, 0.8.1.1, 0.8.1,
0.8.0, 0.7.0, 0.6.3.1, 0.6.3, 0.6.2, 0.6.1, 0.5.1, 0.5.0.1, 0.5.0 (conflict:
yesod-persistent => persistent-template>=2.1 && <2.2)
Backjump limit reached (change with --max-backjumps).