Resolving dependencies... cabal: Could not resolve dependencies: next goal: yesod-auth-oauth (user goal) rejecting: yesod-auth-oauth-1.4.0.2, 1.4.0.1, 1.4.0, 1.3.0, 1.2.0, 1.1.0.2, 1.1.0.0, 1.0.0.1, 1.0.0, 0.8.1, 0.8.0 (global constraint requires ==0.4.1) trying: yesod-auth-oauth-0.4.1 trying: base-4.7.0.1/installed-e4b... (dependency of yesod-auth-oauth-0.4.1) next goal: yesod-form (dependency of yesod-auth-oauth-0.4.1) rejecting: yesod-form-1.4.4.1, 1.4.4, 1.4.3.1, 1.4.3, 1.4.2.1, 1.4.2, 1.4.1.1, 1.4.1, 1.4.0.2, 1.4.0.1, 1.4.0, 1.3.16, 1.3.15.4, 1.3.15.3, 1.3.15.2, 1.3.15.1, 1.3.15, 1.3.14, 1.3.13, 1.3.12, 1.3.11, 1.3.10, 1.3.9.1, 1.3.9, 1.3.8.3, 1.3.8.2, 1.3.8.1, 1.3.8, 1.3.7, 1.3.6, 1.3.5.2, 1.3.5.1, 1.3.5, 1.3.4.4, 1.3.4.3, 1.3.4.2, 1.3.4.1, 1.3.4, 1.3.3, 1.3.2.2, 1.3.2.1, 1.3.2, 1.3.1, 1.3.0.1, 1.3.0, 1.2.1.3, 1.2.1.2, 1.2.1.1, 1.2.1, 1.2.0.2, 1.2.0.1, 1.2.0, 1.1.4.1, 1.1.4, 1.1.3, 1.1.2, 1.1.1.1, 1.1.1, 1.1.0.1, 1.1.0, 1.0.0.4, 1.0.0.3, 1.0.0.2, 1.0.0.1, 1.0.0, 0.4.2.1, 0.4.2, 0.4.1, 0.3.4.2, 0.3.4.1, 0.3.4, 0.3.3, 0.3.2.1, 0.3.2, 0.3.1, 0.2.0.1, 0.2.0, 0.1.0.1, 0.1.0 (conflict: yesod-auth-oauth => yesod-form>=0.0 && <0.1) trying: yesod-form-0.0.0.2 next goal: blaze-builder (dependency of yesod-form-0.0.0.2) rejecting: blaze-builder-0.4.0.1, 0.4.0.0, 0.3.3.4, 0.3.3.3, 0.3.3.2, 0.3.3.1, 0.3.3.0, 0.3.2.0, 0.3.1.1, 0.3.1.0, 0.3.0.2, 0.3.0.1, 0.3.0.0 (conflict: yesod-form => blaze-builder>=0.2.1 && <0.3) rejecting: blaze-builder-0.2.1.4, 0.2.1.3, 0.2.1.2, 0.2.1.1, 0.2.1.0 (conflict: base==4.7.0.1/installed-e4b..., blaze-builder => base>=4 && <4.7) rejecting: blaze-builder-0.2.0.3, 0.2.0.2, 0.2.0.1, 0.2.0.0, 0.1 (conflict: yesod-form => blaze-builder>=0.2.1 && <0.3) Dependency tree exhaustively searched.