Resolving dependencies... cabal: Could not resolve dependencies: next goal: keter (user goal) rejecting: keter-1.4.3.2, keter-1.4.3.1, keter-1.4.3, keter-1.4.2.1, keter-1.4.1, keter-1.4.0.1, keter-1.4.0, keter-1.3.10.1, keter-1.3.10, keter-1.3.9.2, keter-1.3.9.1, keter-1.3.9, keter-1.3.8, keter-1.3.7.1, keter-1.3.7, keter-1.3.6, keter-1.3.5.3 (constraint from user target requires ==1.3.5.2) trying: keter-1.3.5.2 trying: warp-tls-3.2.2 (dependency of keter-1.3.5.2) next goal: wai (dependency of keter-1.3.5.2) rejecting: wai-3.2.1.1, wai-3.2.1, wai-3.2.0.1, wai-3.2.0 (conflict: keter => wai>=3.0 && <3.1) rejecting: wai-3.0.5.0, wai-3.0.4.0, wai-3.0.3.0, wai-3.0.2.3, wai-3.0.2.2, wai-3.0.2.1, wai-3.0.2, wai-3.0.1.1, wai-3.0.1, wai-3.0.0.2, wai-3.0.0.1, wai-3.0.0 (conflict: warp-tls => wai>=3.2 && <3.3) rejecting: wai-2.1.0.3, wai-2.1.0.2, wai-2.1.0.1, wai-2.1.0, wai-2.0.0, wai-1.4.1, wai-1.4.0.2, wai-1.4.0.1, wai-1.4.0, wai-1.3.0.3, wai-1.3.0.2, wai-1.3.0.1, wai-1.3.0, wai-1.2.0.3, wai-1.2.0.2, wai-1.2.0.1, wai-1.2.0, wai-1.1.0.1, wai-1.1.0, wai-1.0.0, wai-0.4.3, wai-0.4.2, wai-0.4.1, wai-0.4.0, wai-0.3.2, wai-0.3.1, wai-0.3.0, wai-0.2.2.1, wai-0.2.2, wai-0.2.1, wai-0.2.0, wai-0.1.0, wai-0.0.1, wai-0.0.0 (conflict: keter => wai>=3.0 && <3.1) Backjump limit reached (currently 2000, change with --max-backjumps or try to run with --reorder-goals).