Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: VKHS (user goal)
rejecting: VKHS-1.7.2, VKHS-1.7.1, VKHS-1.7.0, VKHS-1.6.4, VKHS-1.6.3,
VKHS-1.6.2, VKHS-1.6.1, VKHS-1.6.0, VKHS-0.5.7, VKHS-0.5.6, VKHS-0.5.5,
VKHS-0.5.4, VKHS-0.5.3, VKHS-0.5.2, VKHS-0.5.1, VKHS-0.5.0, VKHS-0.3.3,
VKHS-0.3.2 (constraint from user target requires ==0.3.1)
trying: VKHS-0.3.1
trying: directory-1.2.6.2/installed-1.2... (dependency of VKHS-0.3.1)
next goal: aeson (dependency of VKHS-0.3.1)
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 (conflict: VKHS => aeson>=0.6 && <0.7)
rejecting: 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 (conflict: directory =>
time==1.6.0.1/installed-1.6..., aeson => time<1.5)
rejecting: 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, aeson-0.3.2.10, aeson-0.3.2.9,
aeson-0.3.2.8, aeson-0.3.2.7, aeson-0.3.2.6, aeson-0.3.2.5, aeson-0.3.2.4,
aeson-0.3.2.3, aeson-0.3.2.2, aeson-0.3.2.1, aeson-0.3.2.0, aeson-0.3.1.1,
aeson-0.3.1.0, aeson-0.3.0.0, aeson-0.2.0.0, aeson-0.1.0.0, aeson-0.10.0.0,
aeson-0.8.0.1, aeson-0.8.0.0, aeson-0.7.0.5, aeson-0.7.0.3, aeson-0.7.0.2,
aeson-0.7.0.1, aeson-0.7.0.0 (conflict: VKHS => aeson>=0.6 && <0.7)
Dependency tree exhaustively searched.