Resolving dependencies... cabal: Could not resolve dependencies: next goal: HXQ (user goal) rejecting: HXQ-0.19.0, 0.18.2, 0.18.1, 0.18.0, 0.17.2, 0.17.0, 0.16.0, 0.15.0, 0.14.0, 0.12.0, 0.11.0, 0.10.0, 0.9.0, 0.8.5.1, 0.8.5, 0.8.4, 0.8.3, 0.8, 0.7.4, 0.7.2, 0.7, 0.6, 0.5 (global constraint requires ==0.4) trying: HXQ-0.4 trying: base-4.8.1.0/installed-4f7... (dependency of HXQ-0.4) trying: template-haskell-2.10.0.0/installed-90e... (dependency of HXQ-0.4) trying: pretty-1.1.2.0/installed-293... (dependency of template-haskell-2.10.0.0/installed-90e...) trying: deepseq-1.4.1.1/installed-8fb... (dependency of pretty-1.1.2.0/installed-293...) next goal: haskell98 (dependency of HXQ-0.4) rejecting: haskell98-2.0.0.3 (conflict: base==4.8.1.0/installed-4f7..., haskell98 => base>=4.7 && <4.8) rejecting: haskell98-2.0.0.2 (conflict: base==4.8.1.0/installed-4f7..., haskell98 => base==4.6.*) rejecting: haskell98-2.0.0.1 (conflict: deepseq => array==0.5.1.0/installed-d42..., haskell98 => array>=0.3 && <0.5) rejecting: haskell98-2.0.0.0 (conflict: deepseq => array==0.5.1.0/installed-d42..., haskell98 => array>=0.3 && <0.4) rejecting: haskell98-1.1.0.1, 1.1.0.0, 1.0.1.1 (conflict: base==4.8.1.0/installed-4f7..., haskell98 => base>=3 && <4.6) rejecting: haskell98-1.0.1.0 (conflict: base==4.8.1.0/installed-4f7..., haskell98 => base<4.6) rejecting: haskell98-1.0 (conflict: base==4.8.1.0/installed-4f7..., haskell98 => base<4.3) Dependency tree exhaustively searched.