Resolving dependencies... cabal: Could not resolve dependencies: next goal: scan-vector-machine (user goal) rejecting: scan-vector-machine-0.2.7, scan-vector-machine-0.2.6 (constraint from user target requires ==0.2.5) trying: scan-vector-machine-0.2.5 trying: base-4.9.0.0/installed-4.9... (dependency of scan-vector-machine-0.2.5) next goal: dph-base (dependency of scan-vector-machine-0.2.5) rejecting: dph-base-0.7.0.1 (conflict: base==4.9.0.0/installed-4.9..., dph-base => base==4.6.*) rejecting: dph-base-0.6.1.1, dph-base-0.6.0.1 (conflict: base==4.9.0.0/installed-4.9..., dph-base => base==4.5.*) rejecting: dph-base-0.5.1.1 (conflict: base==4.9.0.0/installed-4.9..., dph-base => base==4.4.*) Dependency tree exhaustively searched.