Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: genvalidity-0.6.1.0 (user goal)
[__1] next goal: validity (dependency of genvalidity)
[__1] rejecting: validity-0.7.0.0, validity-0.6.0.0, validity-0.5.0.0,
validity-0.4.0.4, validity-0.4.0.3, validity-0.4.0.2, validity-0.4.0.1,
validity-0.4.0.0, validity-0.3.3.0, validity-0.3.2.0, validity-0.3.1.1,
validity-0.3.0.4, validity-0.3.0.3, validity-0.3.0.2, validity-0.3.0.1,
validity-0.3.0.0, validity-0.2.0.0, validity-0.1.0.0 (conflict: genvalidity =>
validity>=0.8)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: genvalidity, validity