Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: lambdabot (user goal)
rejecting: lambdabot-5.0.3, 5.0.2.2, 5.0.2.1, 5.0.1, 5.0, 4.3.0.1, 4.3,
4.2.3.3, 4.2.3.2 (global constraint requires ==4.2.3.1)
trying: lambdabot-4.2.3.1
trying: base-4.8.1.0/installed-4f7... (dependency of lambdabot-4.2.3.1)
next goal: lambdabot-utils (dependency of lambdabot-4.2.3.1)
rejecting: lambdabot-utils-4.2.2, 4.2.1 (conflict:
base==4.8.1.0/installed-4f7..., lambdabot-utils => base>=4 && <4.8)
rejecting: lambdabot-utils-4.2, 4.1 (conflict: base==4.8.1.0/installed-4f7...,
lambdabot-utils => base<4.8)
Dependency tree exhaustively searched.