Resolving dependencies... cabal: Could not resolve dependencies: next goal: zoom-cache (user goal) rejecting: zoom-cache-1.2.1.6, zoom-cache-1.2.1.5, zoom-cache-1.2.1.4, zoom-cache-1.2.1.3, zoom-cache-1.2.1.2, zoom-cache-1.2.1.1, zoom-cache-1.2.1.0, zoom-cache-1.2.0.0, zoom-cache-1.1.0.0, zoom-cache-1.0.0.0, zoom-cache-0.9.1.0, zoom-cache-0.9.0.0, zoom-cache-0.8.1.0, zoom-cache-0.8.0.0, zoom-cache-0.7.0.0, zoom-cache-0.6.0.0, zoom-cache-0.5.1.0, zoom-cache-0.5.0.0, zoom-cache-0.4.0.0, zoom-cache-0.3.0.0, zoom-cache-0.2.1.1, zoom-cache-0.2.1.0, zoom-cache-0.2.0.0, zoom-cache-0.1.0.2 (constraint from user target requires ==0.1.0.1) trying: zoom-cache-0.1.0.1 trying: base-4.9.0.0/installed-4.9... (dependency of zoom-cache-0.1.0.1) trying: transformers-0.5.2.0/installed-0.5... (dependency of mtl-2.2.1) next goal: MonadCatchIO-transformers (dependency of zoom-cache-0.1.0.1) rejecting: MonadCatchIO-transformers-0.3.1.3 (conflict: base==4.9.0.0/installed-4.9..., MonadCatchIO-transformers => base<4.9) rejecting: MonadCatchIO-transformers-0.3.1.2, MonadCatchIO-transformers-0.3.1.1, MonadCatchIO-transformers-0.3.1.0 (conflict: base==4.9.0.0/installed-4.9..., MonadCatchIO-transformers => base<4.8) rejecting: MonadCatchIO-transformers-0.3.0.0, MonadCatchIO-transformers-0.2.2.3, MonadCatchIO-transformers-0.2.2.2, MonadCatchIO-transformers-0.2.2.1, MonadCatchIO-transformers-0.2.2.0, MonadCatchIO-transformers-0.2.1.0, MonadCatchIO-transformers-0.2.0.0 (conflict: base==4.9.0.0/installed-4.9..., MonadCatchIO-transformers => base<4.7) rejecting: MonadCatchIO-transformers-0.1.0.1 (conflict: transformers==0.5.2.0/installed-0.5..., MonadCatchIO-transformers => transformers==0.1.*) rejecting: MonadCatchIO-transformers-0.1.0.0, MonadCatchIO-transformers-0.0.2.0, MonadCatchIO-transformers-0.0.1.0 (conflict: transformers==0.5.2.0/installed-0.5..., MonadCatchIO-transformers => transformers<0.2) Dependency tree exhaustively searched.