Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: bullet (user goal)
rejecting: bullet-0.2.4 (conflict: requires pkg-config package bullet-any, not
found in the pkg-config database)
rejecting: bullet-0.2.3, bullet-0.2.2, bullet-0.2.1, bullet-0.1.1 (constraint
from user target requires ==0.2.4)
Dependency tree exhaustively searched.