Resolving dependencies... cabal: Could not resolve dependencies: next goal: servant-JuicyPixels (user goal) rejecting: servant-JuicyPixels-0.3.0.2 (constraint from user target requires ==0.3.0.1) trying: servant-JuicyPixels-0.3.0.1 trying: servant-server-0.9.1.1 (dependency of servant-JuicyPixels-0.3.0.1) next goal: servant (dependency of servant-JuicyPixels-0.3.0.1) rejecting: servant-0.9.1.1, servant-0.9.1, servant-0.9.0.1, servant-0.9, servant-0.8.1, servant-0.8, servant-0.7.1, servant-0.7, servant-0.6.1, servant-0.6 (conflict: servant-JuicyPixels => servant>=0.4 && <0.6) rejecting: servant-0.5, servant-0.4.4.7, servant-0.4.4.6, servant-0.4.4.5, servant-0.4.4.4, servant-0.4.4.3, servant-0.4.4.2, servant-0.4.4, servant-0.4.3.1, servant-0.4.3, servant-0.4.2, servant-0.4.1, servant-0.4.0 (conflict: servant-server => servant==0.9.*) rejecting: servant-0.2.2, servant-0.2.1, servant-0.2, servant-0.1 (conflict: servant-JuicyPixels => servant>=0.4 && <0.6) Backjump limit reached (currently 2000, change with --max-backjumps or try to run with --reorder-goals).