Resolving dependencies... cabal: Could not resolve dependencies: next goal: numeric-prelude (user goal) rejecting: numeric-prelude-0.4.2, numeric-prelude-0.4.1, numeric-prelude-0.4.0.3, numeric-prelude-0.4.0.2, numeric-prelude-0.4.0.1, numeric-prelude-0.4, numeric-prelude-0.3.0.2, numeric-prelude-0.3.0.1, numeric-prelude-0.3, numeric-prelude-0.2.2.1, numeric-prelude-0.2.2, numeric-prelude-0.2.1, numeric-prelude-0.2, numeric-prelude-0.1.3.4 (constraint from user target requires ==0.1.3.3) trying: numeric-prelude-0.1.3.3 trying: base-4.9.0.0/installed-4.9... (dependency of numeric-prelude-0.1.3.3) trying: deepseq-1.4.2.0/installed-1.4... (dependency of time-1.6.0.1/installed-1.6...) trying: numeric-prelude-0.1.3.3:-buildtests rejecting: numeric-prelude-0.1.3.3:+splitbase (conflict: deepseq => array==0.5.1.1/installed-0.5..., numeric-prelude-0.1.3.3:splitbase => array>=0.1 && <0.4) rejecting: numeric-prelude-0.1.3.3:-splitbase (conflict: base==4.9.0.0/installed-4.9..., numeric-prelude-0.1.3.3:splitbase => base>=1.0 && <2) Backjump limit reached (currently 2000, change with --max-backjumps or try to run with --reorder-goals).