Resolving dependencies... cabal: Could not resolve dependencies: next goal: accelerate-cuda (user goal) rejecting: accelerate-cuda-0.15.1.1, accelerate-cuda-0.15.1.0, accelerate-cuda-0.15.0.0, accelerate-cuda-0.14.0.0, accelerate-cuda-0.13.0.4, accelerate-cuda-0.13.0.3, accelerate-cuda-0.13.0.2, accelerate-cuda-0.13.0.1, accelerate-cuda-0.13.0.0, accelerate-cuda-0.12.1.2, accelerate-cuda-0.12.1.1 (constraint from user target requires ==0.12.1.0) trying: accelerate-cuda-0.12.1.0 trying: deepseq-1.4.2.0/installed-1.4... (dependency of time-1.6.0.1/installed-1.6...) next goal: accelerate (dependency of accelerate-cuda-0.12.1.0) rejecting: accelerate-0.15.1.0, accelerate-0.15.0.0, accelerate-0.14.0.0, accelerate-0.13.0.5, accelerate-0.13.0.4, accelerate-0.13.0.3, accelerate-0.13.0.2, accelerate-0.13.0.1, accelerate-0.13.0.0 (conflict: accelerate-cuda => accelerate>=0.12.1 && <0.13) rejecting: accelerate-0.12.2.0, accelerate-0.12.1.0 (conflict: deepseq => array==0.5.1.1/installed-0.5..., accelerate => array>=0.3 && <0.5) rejecting: accelerate-0.12.0.0, accelerate-0.10.0.0, accelerate-0.9.0.1, accelerate-0.9.0.0, accelerate-0.8.1.0, accelerate-0.8.0.0, accelerate-0.7.1.0, accelerate-0.6.0.0, accelerate-0.5.0.0, accelerate-0.4.0 (conflict: accelerate-cuda => accelerate>=0.12.1 && <0.13) Dependency tree exhaustively searched.