Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] trying: templates-0.1.0.0 (user goal) [__1] next goal: text (dependency of templates) [__1] rejecting: text-2.1.1/installed-inplace (conflict: templates => text>=2.1.3 && <2.2) [__1] trying: text-2.1.4 [__2] trying: template-haskell-2.21.0.0/installed-inplace (dependency of text) [__3] next goal: reflex-classhss (dependency of templates) [__3] rejecting: reflex-classhss-0.1.0.0 (conflict: template-haskell==2.21.0.0/installed-inplace, reflex-classhss => template-haskell>=2.22.0 && <2.23) [__3] fail (backjumping, conflict set: reflex-classhss, template-haskell, templates) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: templates, text, template-haskell, reflex-classhss Try running with --minimize-conflict-set to improve the error message.