Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: aeson (user goal)
rejecting: aeson-1.0.2.1, aeson-1.0.2.0, aeson-1.0.1.0, aeson-1.0.0.0,
aeson-0.11.2.1, aeson-0.11.2.0, aeson-0.11.1.4, aeson-0.11.1.3,
aeson-0.11.1.2, aeson-0.11.1.1, aeson-0.11.1.0, aeson-0.11.0.0, aeson-0.9.0.1,
aeson-0.9.0.0, aeson-0.8.1.1, aeson-0.8.1.0, aeson-0.8.0.2, aeson-0.7.0.6,
aeson-0.7.0.4, aeson-0.6.2.1, aeson-0.6.2.0, aeson-0.6.1.0, aeson-0.6.0.2,
aeson-0.6.0.1, aeson-0.6.0.0, aeson-0.5.0.0, aeson-0.4.0.1, aeson-0.4.0.0,
aeson-0.3.2.14, aeson-0.3.2.13, aeson-0.3.2.12, aeson-0.3.2.11 (constraint
from user target requires ==0.3.2.10)
trying: aeson-0.3.2.10
trying: base-4.9.0.0/installed-4.9... (dependency of aeson-0.3.2.10)
next goal: hashable (dependency of aeson-0.3.2.10)
rejecting: hashable-1.2.4.0, hashable-1.2.3.3, hashable-1.2.3.2,
hashable-1.2.3.1, hashable-1.2.3.0, hashable-1.2.2.0, hashable-1.2.1.0,
hashable-1.2.0.10, hashable-1.2.0.9, hashable-1.2.0.8, hashable-1.2.0.7,
hashable-1.2.0.6, hashable-1.2.0.5, hashable-1.2.0.4, hashable-1.2.0.3,
hashable-1.2.0.2, hashable-1.2.0.1, hashable-1.2.0.0 (conflict: aeson =>
hashable>=1.1.2.0 && <1.2)
rejecting: hashable-1.1.2.5, hashable-1.1.2.4, hashable-1.1.2.3 (conflict:
base==4.9.0.0/installed-4.9..., hashable => base>=4.0 && <4.8)
rejecting: hashable-1.1.2.2, hashable-1.1.2.1, hashable-1.1.2.0 (conflict:
base => ghc-prim==0.5.0.0/installed-0.5..., hashable => ghc-prim<0.3)
rejecting: hashable-1.1.1.0, hashable-1.1.0.0, hashable-1.0.1.1,
hashable-1.0.1.0, hashable-1.0.0 (conflict: aeson => hashable>=1.1.2.0 &&
<1.2)
Dependency tree exhaustively searched.