Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: aeson (user goal)
rejecting: aeson-0.10.0.0, 0.9.0.1, 0.9.0.0, 0.8.1.1, 0.8.1.0, 0.8.0.2,
0.7.0.6, 0.7.0.4, 0.6.2.1, 0.6.2.0, 0.6.1.0, 0.6.0.2, 0.6.0.1, 0.6.0.0,
0.5.0.0, 0.4.0.1, 0.4.0.0, 0.3.2.14, 0.3.2.13, 0.3.2.12, 0.3.2.11 (global
constraint requires ==0.3.2.10)
trying: aeson-0.3.2.10
trying: base-4.8.1.0/installed-4f7... (dependency of aeson-0.3.2.10)
next goal: hashable (dependency of aeson-0.3.2.10)
rejecting: hashable-1.2.3.3, 1.2.3.2, 1.2.3.1, 1.2.3.0, 1.2.2.0, 1.2.1.0,
1.2.0.10, 1.2.0.9, 1.2.0.8, 1.2.0.7, 1.2.0.6, 1.2.0.5, 1.2.0.4, 1.2.0.3,
1.2.0.2, 1.2.0.1, 1.2.0.0 (conflict: aeson => hashable>=1.1.2.0 && <1.2)
rejecting: hashable-1.1.2.5, 1.1.2.4, 1.1.2.3 (conflict:
base==4.8.1.0/installed-4f7..., hashable => base>=4.0 && <4.8)
rejecting: hashable-1.1.2.2, 1.1.2.1, 1.1.2.0 (conflict: base =>
ghc-prim==0.4.0.0/installed-af1..., hashable => ghc-prim<0.3)
rejecting: hashable-1.1.1.0, 1.1.0.0, 1.0.1.1, 1.0.1.0, 1.0.0 (conflict: aeson
=> hashable>=1.1.2.0 && <1.2)
Dependency tree exhaustively searched.