Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: gruff-examples (user goal)
rejecting: gruff-examples-0.4, gruff-examples-0.3.1 (constraint from user
target requires ==0.3)
trying: gruff-examples-0.3
trying: array-0.5.1.1/installed-0.5... (dependency of
data-memocombinators-0.4.5)
next goal: Vec (dependency of gruff-examples-0.3)
rejecting: Vec-1.0.5, Vec-1.0.1, Vec-1.0 (conflict: gruff-examples => Vec>=0.9
&& <1.0)
trying: Vec-0.9.9
next goal: ruff (dependency of gruff-examples-0.3)
rejecting: ruff-0.4.0.1, 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==0.5.1.1/installed-0.5..., ruff =>
array>=0.3 && <0.5)
rejecting: ruff-0.3 (conflict: array==0.5.1.1/installed-0.5..., ruff =>
array>=0.3 && <0.4)
rejecting: ruff-0.2, ruff-0.1 (conflict: gruff-examples => ruff>=0.3 && <0.4)
Dependency tree exhaustively searched.