Resolving dependencies... cabal: Could not resolve dependencies: trying: data-store-0.3.0.7 (user goal) trying: safecopy-0.8.6 (dependency of data-store-0.3.0.7) trying: template-haskell-2.10.0.0/installed-90e... (dependency of safecopy-0.8.6) next goal: pretty (dependency of template-haskell-2.10.0.0/installed-90e...) rejecting: pretty-1.1.2.0/installed-293... (conflict: pretty => deepseq==1.4.1.1/installed-8fb..., data-store => deepseq>=1.3.0 && <1.4) rejecting: pretty-1.1.3.2, 1.1.3.1, 1.1.2.1, 1.1.2.0, 1.1.1.3, 1.1.1.2, 1.1.1.1, 1.1.1.0, 1.1.0.0, 1.0.1.2, 1.0.1.1, 1.0.1.0, 1.0.0.0 (conflict: template-haskell => pretty==1.1.2.0/installed-293...) Dependency tree exhaustively searched.