Resolving dependencies... cabal: Could not resolve dependencies: next goal: highlight-versions (user goal) rejecting: highlight-versions-0.1.3.6, highlight-versions-0.1.3.5, highlight-versions-0.1.3.4 (constraint from user target requires ==0.1.3.3) trying: highlight-versions-0.1.3.3 trying: unix-2.7.2.0/installed-2.7... (dependency of ansi-terminal-0.6.2.3) trying: time-1.6.0.1/installed-1.6... (dependency of unix-2.7.2.0/installed-2.7...) next goal: Cabal (dependency of highlight-versions-0.1.3.3) rejecting: Cabal-1.24.0.0/installed-1.2..., Cabal-1.24.2.0, Cabal-1.24.0.0, Cabal-1.22.8.0, Cabal-1.22.7.0, Cabal-1.22.6.0, Cabal-1.22.5.0, Cabal-1.22.4.0, Cabal-1.22.3.0, Cabal-1.22.2.0, Cabal-1.22.1.1, Cabal-1.22.1.0, Cabal-1.22.0.0, Cabal-1.20.0.4, Cabal-1.20.0.3, Cabal-1.20.0.2, Cabal-1.20.0.1, Cabal-1.20.0.0 (conflict: highlight-versions => Cabal>=1.14 && <1.19) rejecting: Cabal-1.18.1.7, Cabal-1.18.1.6 (conflict: unix => time==1.6.0.1/installed-1.6..., Cabal => time>=1.1 && <1.6) rejecting: Cabal-1.18.1.5, Cabal-1.18.1.4, Cabal-1.18.1.3, Cabal-1.18.1.2, Cabal-1.18.1.1, Cabal-1.18.1, Cabal-1.18.0 (conflict: time => deepseq==1.4.2.0/installed-1.4..., Cabal => deepseq>=1.3 && <1.4) rejecting: Cabal-1.16.0.3, Cabal-1.16.0.2, Cabal-1.16.0.1, Cabal-1.16.0 (conflict: unix==2.7.2.0/installed-2.7..., Cabal => unix>=2.0 && <2.7) rejecting: Cabal-1.14.0 (conflict: unix==2.7.2.0/installed-2.7..., Cabal => unix>=2.0 && <2.6) rejecting: Cabal-1.12.0, Cabal-1.10.2.0, Cabal-1.10.1.0, Cabal-1.10.0.0, Cabal-1.8.0.6, Cabal-1.8.0.4, Cabal-1.8.0.2, Cabal-1.6.0.3, Cabal-1.6.0.2, Cabal-1.6.0.1, Cabal-1.4.0.2, Cabal-1.4.0.1, Cabal-1.4.0.0, Cabal-1.2.4.0, Cabal-1.2.3.0, Cabal-1.2.2.0, Cabal-1.2.1, Cabal-1.1.6, Cabal-1.24.1.0 (conflict: highlight-versions => Cabal>=1.14 && <1.19) Backjump limit reached (currently 2000, change with --max-backjumps or try to run with --reorder-goals).