Resolving dependencies... cabal: Could not resolve dependencies: trying: ta-0.1 (user goal) trying: base-4.7.0.1/installed-e4b... (dependency of ta-0.1) next goal: template-haskell (dependency of ta-0.1) rejecting: template-haskell-2.9.0.0/installed-3af..., 2.10.0.0, 2.9.0.0, 2.8.0.0, 2.7.0.0, 2.6.0.0, 2.5.0.0 (conflict: ta => template-haskell>=2.4 && <2.5) rejecting: template-haskell-2.4.0.1 (conflict: base==4.7.0.1/installed-e4b..., template-haskell => base==4.2.*) rejecting: template-haskell-2.4.0.0 (conflict: base==4.7.0.1/installed-e4b..., template-haskell => base>=3 && <4.3) rejecting: template-haskell-2.3.0.1, 2.3.0.0, 2.2.0.0 (conflict: ta => template-haskell>=2.4 && <2.5) Dependency tree exhaustively searched.