Resolving dependencies... cabal: Could not resolve dependencies: trying: base-4.9.0.0/installed-4.9... (dependency of keter-0.2.0.3) next goal: crypto-api (dependency of keter-0.2.0.3) rejecting: crypto-api-0.13.2, crypto-api-0.13, crypto-api-0.12.2.2, crypto-api-0.12.2.1, crypto-api-0.12.2, crypto-api-0.12.1, crypto-api-0.12, crypto-api-0.11 (conflict: keter => crypto-api>=0.10 && <0.11) trying: crypto-api-0.10.2 next goal: cereal (dependency of crypto-api-0.10.2) rejecting: cereal-0.5.4.0, cereal-0.5.3.0, cereal-0.5.2.0, cereal-0.5.1.0, cereal-0.5.0.0, cereal-0.4.1.1, cereal-0.4.1.0, cereal-0.4.0.1, cereal-0.4.0.0 (conflict: crypto-api => cereal>=0.2 && <0.4) rejecting: cereal-0.3.5.2 (conflict: base==4.9.0.0/installed-4.9..., cereal => base>=4 && <4.7 || <3.0) rejecting: cereal-0.3.5.1, cereal-0.3.5.0 (conflict: base==4.9.0.0/installed-4.9..., cereal => base>=4 && <4.6 || <3.0) rejecting: cereal-0.3.4.0, cereal-0.3.3.0, cereal-0.3.2.0, cereal-0.3.1.0, cereal-0.3.0.0, cereal-0.2 (conflict: base==4.9.0.0/installed-4.9..., cereal => base>=4 && <4.7 || <3.0) rejecting: cereal-0.1 (conflict: crypto-api => cereal>=0.2 && <0.4) Dependency tree exhaustively searched.