Resolving dependencies...
cabal: Could not resolve dependencies:
trying: base-4.9.0.0/installed-4.9... (dependency of yesod-0.6.2)
next goal: containers (dependency of yesod-0.6.2)
rejecting: containers-0.5.7.1/installed-0.5..., containers-0.5.9.1,
containers-0.5.8.1, containers-0.5.7.1, containers-0.5.7.0,
containers-0.5.6.3, containers-0.5.6.2, containers-0.5.6.1,
containers-0.5.6.0, containers-0.5.5.1, containers-0.5.5.0,
containers-0.5.4.0, containers-0.5.3.1, containers-0.5.3.0,
containers-0.5.2.1, containers-0.5.2.0, containers-0.5.1.0, containers-0.5.0.0
(conflict: yesod => containers>=0.2 && <0.5)
trying: containers-0.4.2.1
next goal: deepseq (dependency of containers-0.4.2.1)
rejecting: deepseq-1.4.2.0/installed-1.4..., deepseq-1.4.2.0, deepseq-1.4.1.2,
deepseq-1.4.1.1, deepseq-1.4.1.0, deepseq-1.4.0.0 (conflict: containers =>
deepseq>=1.2 && <1.4)
rejecting: deepseq-1.3.0.2 (conflict: base==4.9.0.0/installed-4.9..., deepseq
=> base>=4.3 && <4.8)
trying: deepseq-1.3.0.1
next goal: array (dependency of containers-0.4.2.1)
rejecting: array-0.5.1.1/installed-0.5..., array-0.5.1.1, array-0.5.1.0,
array-0.5.0.0 (conflict: deepseq => array>=0.1 && <0.5)
rejecting: array-0.4.0.1 (conflict: base==4.9.0.0/installed-4.9..., array =>
base>=4.2 && <4.7)
rejecting: array-0.4.0.0 (conflict: base==4.9.0.0/installed-4.9..., array =>
base>=4.2 && <4.6)
rejecting: array-0.3.0.3 (conflict: base==4.9.0.0/installed-4.9..., array =>
base>=4.2 && <4.5)
rejecting: array-0.3.0.2, array-0.3.0.1 (conflict:
base==4.9.0.0/installed-4.9..., array => base>=4.2 && <4.4)
rejecting: array-0.3.0.0 (conflict: base==4.9.0.0/installed-4.9..., array =>
base>=3 && <4.4)
rejecting: array-0.2.0.0, array-0.1.0.0 (conflict:
base==4.9.0.0/installed-4.9..., array => base<4.3)
Dependency tree exhaustively searched.