Resolving dependencies...
cabal: Could not resolve dependencies:
trying: gruff-examples-0.3.1 (user goal)
next goal: data-memocombinators (dependency of gruff-examples-0.3.1)
rejecting: data-memocombinators-0.5.1, 0.5.0 (conflict: gruff-examples =>
data-memocombinators>=0.4 && <0.5)
trying: data-memocombinators-0.4.5
trying: array-0.5.0.0/installed-98a... (dependency of
data-memocombinators-0.4.5)
next goal: Vec (dependency of gruff-examples-0.3.1)
rejecting: Vec-1.0.5, 1.0.1, 1.0 (conflict: gruff-examples => Vec>=0.9 &&
<1.0)
trying: Vec-0.9.9
trying: gruff-0.3.4 (dependency of gruff-examples-0.3.1)
next goal: ruff (dependency of gruff-examples-0.3.1)
rejecting: ruff-0.4 (conflict: gruff-examples => ruff>=0.3 && <0.4)
rejecting: ruff-0.3.2.1 (conflict: Vec==0.9.9, ruff => Vec>=1 && <2)
rejecting: ruff-0.3.2 (conflict: array==0.5.0.0/installed-98a..., ruff =>
array>=0.3 && <0.5)
rejecting: ruff-0.3 (conflict: gruff => ruff>=0.3.2 && <0.4)
rejecting: ruff-0.2, 0.1 (conflict: gruff-examples => ruff>=0.3 && <0.4)
Backjump limit reached (change with --max-backjumps).