Resolving dependencies... cabal: Could not resolve dependencies: next goal: hdbi-postgresql (user goal) rejecting: hdbi-postgresql-1.3.0 (constraint from user target requires ==1.2.0) trying: hdbi-postgresql-1.2.0 trying: unix-2.7.2.0/installed-2.7... (dependency of entropy-0.3.7) next goal: hdbi (dependency of hdbi-postgresql-1.2.0) rejecting: hdbi-1.3.0, hdbi-1.2.0 (conflict: unix => time==1.6.0.1/installed-1.6..., hdbi => time>=1.1.2.4 && <=1.5) rejecting: hdbi-1.1.1, hdbi-1.1.0, hdbi-1.0.0 (conflict: hdbi-postgresql => hdbi>=1.2.0) Backjump limit reached (currently 2000, change with --max-backjumps or try to run with --reorder-goals).