Resolving dependencies... cabal: Could not resolve dependencies: next goal: persistent-mongoDB (user goal) rejecting: persistent-mongoDB-2.1.4, 2.1.2.2, 2.1.2.1, 2.1.2, 2.1.1, 2.1, 1.4.4.4, 1.4.4.3, 1.4.3, 1.4.2.1, 1.4.2, 1.4.1.1, 1.4.1, 1.3.3.1, 1.3.3, 1.3.2, 1.3.1.1, 1.3.0.4, 1.3.0.3, 1.3.0.2, 1.3.0.1, 1.2.3, 1.2.2, 1.2.1.2, 1.2.1.1, 1.2.1, 1.2.0.1, 1.2.0, 1.1.6, 1.1.5.2, 1.1.5.1, 1.1.5, 1.1.4, 1.1.3, 1.1.2, 1.1.0, 1.0.1.0, 1.0.0.1, 1.0.0 (global constraint requires ==0.9.0.3) trying: persistent-mongoDB-0.9.0.3 next goal: mongoDB (dependency of persistent-mongoDB-0.9.0.3) rejecting: mongoDB-2.0.9, 2.0.8, 2.0.7, 2.0.6, 2.0.5, 2.0.4, 2.0.3, 2.0.2, 2.0.1, 2.0, 1.5.0, 1.4.4, 1.4.3, 1.4.2, 1.4.1.1, 1.4.1, 1.4.0, 1.3.2, 1.3.1, 1.3.0 (conflict: persistent-mongoDB => mongoDB>=1.2 && <1.3) trying: mongoDB-1.2.0 trying: lifted-base-0.2.3.6 (dependency of mongoDB-1.2.0) next goal: resourcet (dependency of persistent-mongoDB-0.9.0.3) rejecting: resourcet-1.1.6, 1.1.5, 1.1.4.1, 1.1.4, 1.1.3.3, 1.1.3.2, 1.1.3.1, 1.1.3, 1.1.2.3, 1.1.2.2, 1.1.2.1, 1.1.2, 1.1.1, 1.1.0.1, 1.1.0, 0.4.10.2, 0.4.10.1, 0.4.10, 0.4.9, 0.4.8, 0.4.7.2, 0.4.7.1, 0.4.7, 0.4.6, 0.4.5, 0.4.4, 0.4.3, 0.4.2, 0.4.1, 0.4.0.2, 0.4.0.1, 0.4.0 (conflict: persistent-mongoDB => resourcet>=0.3 && <0.4) rejecting: resourcet-0.3.3.1, 0.3.3, 0.3.2.2, 0.3.2.1, 0.3.2, 0.3.1, 0.3.0 (conflict: lifted-base==0.2.3.6, resourcet => lifted-base>=0.1 && <0.2) Dependency tree exhaustively searched.