Resolving dependencies... cabal: Could not resolve dependencies: trying: halipeto-2.4.1 (user goal) trying: base-4.8.1.0/installed-4f7... (dependency of halipeto-2.4.1) next goal: HaXml (dependency of halipeto-2.4.1) rejecting: HaXml-1.25.3, 1.25.2, 1.25.1, 1.25, 1.24.1, 1.24, 1.23.3, 1.23.2, 1.23.1, 1.23, 1.22.5, 1.22.4, 1.22.3, 1.22.2, 1.22.1, 1.22 (conflict: halipeto => HaXml>=1.20 && <1.22) trying: HaXml-1.20.2 next goal: haskell98 (dependency of HaXml-1.20.2) rejecting: haskell98-2.0.0.3, 2.0.0.2, 2.0.0.1, 2.0.0.0 (conflict: HaXml => haskell98<2) 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.