Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: json2yaml (user goal)
rejecting: json2yaml-0.3.2.3, 0.3.2.2 (global constraint requires ==0.3.2.1)
trying: json2yaml-0.3.2.1
trying: yaml-0.8.15.1 (dependency of json2yaml-0.3.2.1)
trying: directory-1.2.2.0/installed-258... (dependency of yaml-0.8.15.1)
trying: scientific-0.3.4.2 (dependency of yaml-0.8.15.1)
trying: hashable-1.2.3.3 (dependency of scientific-0.3.4.2)
next goal: aeson (dependency of json2yaml-0.3.2.1)
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 (conflict: json2yaml => aeson>=0.6 && <0.7)
rejecting: aeson-0.6.2.1, 0.6.2.0, 0.6.1.0 (conflict: directory =>
time==1.5.0.1/installed-c20..., aeson => time<1.5)
rejecting: aeson-0.6.0.2, 0.6.0.1, 0.6.0.0 (conflict: hashable==1.2.3.3, aeson
=> hashable>=1.1.2.0 && <1.2)
rejecting: aeson-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, 0.3.2.10, 0.3.2.9, 0.3.2.8, 0.3.2.7, 0.3.2.6, 0.3.2.5, 0.3.2.4,
0.3.2.3, 0.3.2.2, 0.3.2.1, 0.3.2.0, 0.3.1.1, 0.3.1.0, 0.3.0.0, 0.2.0.0,
0.1.0.0, 0.8.0.1, 0.8.0.0, 0.7.0.5, 0.7.0.3, 0.7.0.2, 0.7.0.1, 0.7.0.0
(conflict: json2yaml => aeson>=0.6 && <0.7)
Backjump limit reached (change with --max-backjumps).