Resolving dependencies... cabal: Could not resolve dependencies: next goal: ghc-imported-from (user goal) rejecting: ghc-imported-from-0.3.0.6, ghc-imported-from-0.3.0.5, ghc-imported-from-0.3.0.4, ghc-imported-from-0.3.0.3, ghc-imported-from-0.3.0.2, ghc-imported-from-0.3.0.1, ghc-imported-from-0.3.0.0 (constraint from user target requires ==0.2.1.1) trying: ghc-imported-from-0.2.1.1 trying: Cabal-1.24.0.0/installed-1.2... (dependency of ghc-imported-from-0.2.1.1) next goal: ghc-mod (dependency of ghc-imported-from-0.2.1.1) rejecting: ghc-mod-5.6.0.0 (conflict: ghc-imported-from => ghc-mod==5.5.0.0) rejecting: ghc-mod-5.5.0.0 (conflict: Cabal => binary==0.8.3.0/installed-0.8..., ghc-mod => binary<0.8 && >=0.5.1.0) rejecting: ghc-mod-5.4.0.0, ghc-mod-5.3.0.0, ghc-mod-5.2.1.2, ghc-mod-5.2.1.1, ghc-mod-5.2.1.0, ghc-mod-5.2.0.0, ghc-mod-5.1.1.0, ghc-mod-5.1.0.2, ghc-mod-5.1.0.1, ghc-mod-5.1.0.0, ghc-mod-5.0.1.2, ghc-mod-5.0.1.1, ghc-mod-5.0.1, ghc-mod-5.0.0, ghc-mod-4.1.6, ghc-mod-4.1.5, ghc-mod-4.1.4, ghc-mod-4.1.3, ghc-mod-4.1.2, ghc-mod-4.1.1, ghc-mod-4.1.0, ghc-mod-4.0.2, ghc-mod-4.0.1, ghc-mod-4.0.0, ghc-mod-3.1.7, ghc-mod-3.1.6, ghc-mod-3.1.5, ghc-mod-3.1.4, ghc-mod-3.1.3, ghc-mod-3.1.2, ghc-mod-3.1.1, ghc-mod-3.1.0, ghc-mod-3.0.2, ghc-mod-3.0.1, ghc-mod-3.0.0, ghc-mod-2.1.2, ghc-mod-2.1.1, ghc-mod-2.1.0, ghc-mod-2.0.3, ghc-mod-2.0.2, ghc-mod-2.0.1, ghc-mod-2.0.0, ghc-mod-1.12.5, ghc-mod-1.12.4, ghc-mod-1.12.3, ghc-mod-1.12.2, ghc-mod-1.12.1, ghc-mod-1.12.0, ghc-mod-1.11.5, ghc-mod-1.11.4, ghc-mod-1.11.3, ghc-mod-1.11.2, ghc-mod-1.11.1, ghc-mod-1.11.0, ghc-mod-1.10.18, ghc-mod-1.10.17, ghc-mod-1.10.16, ghc-mod-1.10.15, ghc-mod-1.10.14, ghc-mod-1.10.13, ghc-mod-1.10.12, ghc-mod-1.10.11, ghc-mod-1.10.10, ghc-mod-1.10.9, ghc-mod-1.10.8, ghc-mod-1.10.7, ghc-mod-1.10.6, ghc-mod-1.10.5, ghc-mod-1.10.4, ghc-mod-1.10.3, ghc-mod-1.10.2, ghc-mod-1.10.1, ghc-mod-1.10.0, ghc-mod-1.0.8, ghc-mod-1.0.7, ghc-mod-1.0.6, ghc-mod-1.0.5, ghc-mod-1.0.4, ghc-mod-1.0.3, ghc-mod-1.0.2, ghc-mod-1.0.1, ghc-mod-1.0.0, ghc-mod-0.6.2, ghc-mod-0.6.1, ghc-mod-0.6.0, ghc-mod-0.5.5, ghc-mod-0.5.4, ghc-mod-0.5.3, ghc-mod-0.5.2, ghc-mod-0.5.1, ghc-mod-0.4.4, ghc-mod-0.4.3, ghc-mod-0.4.2, ghc-mod-0.4.1, ghc-mod-0.4.0, ghc-mod-0.3.0, ghc-mod-0.2.0, ghc-mod-0.1.0 (conflict: ghc-imported-from => ghc-mod==5.5.0.0) Backjump limit reached (currently 2000, change with --max-backjumps or try to run with --reorder-goals).