Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: stepwise (user goal)
rejecting: stepwise-1.0.2 (global constraint requires ==1.0.1)
trying: stepwise-1.0.1
trying: criterion-1.1.0.0 (dependency of stepwise-1.0.1)
next goal: progression (dependency of stepwise-1.0.1)
rejecting: progression-0.5.0.2 (conflict: criterion==1.1.0.0, progression =>
criterion>=0.4 && <0.9)
rejecting: progression-0.5.0.1 (conflict: criterion==1.1.0.0, progression =>
criterion>=0.4 && <0.7)
rejecting: progression-0.5, 0.4 (conflict: criterion==1.1.0.0, progression =>
criterion>=0.4 && <0.6)
rejecting: progression-0.3, 0.2, 0.1 (conflict: stepwise => progression>=0.4)
Backjump limit reached (change with --max-backjumps).