Resolving dependencies... cabal: Could not resolve dependencies: [__0] trying: espial-0.0.3 (user goal) [__1] trying: yesod-static-1.6.0 (dependency of espial) [__2] trying: yesod-form-1.6.1 (dependency of espial) [__3] trying: yesod-persistent-1.6.0 (dependency of yesod-form) [__4] trying: yesod-core-1.6.5 (dependency of espial) [__5] trying: persistent-2.8.2 (dependency of espial) [__6] next goal: esqueleto (dependency of espial) [__6] rejecting: esqueleto-2.5.3, esqueleto-2.5.2 (conflict: persistent==2.8.2, esqueleto => persistent>=2.5 && <2.8) [__6] rejecting: esqueleto-2.5.1 (conflict: persistent==2.8.2, esqueleto => persistent>=2.5 && <2.7) [__6] rejecting: esqueleto-2.5.0 (conflict: persistent==2.8.2, esqueleto => persistent>=2.5 && <2.6) [__6] rejecting: esqueleto-2.4.3, esqueleto-2.4.2, esqueleto-2.4.1, esqueleto-2.4.0, esqueleto-2.3.0, esqueleto-2.2.12, esqueleto-2.2.11, esqueleto-2.2.10, esqueleto-2.2.9, esqueleto-2.2.8, esqueleto-2.2.7, esqueleto-2.2.6, esqueleto-2.2.5 (conflict: persistent==2.8.2, esqueleto => persistent>=2.1.1.7 && <2.3) [__6] rejecting: esqueleto-2.2.4, esqueleto-2.2.3, esqueleto-2.2.2, esqueleto-2.2.1, esqueleto-2.2, esqueleto-2.1.3 (conflict: persistent==2.8.2, esqueleto => persistent>=2.1.1.7 && <2.2) [__6] rejecting: esqueleto-2.1.2.3, esqueleto-2.1.2.2, esqueleto-2.1.2.1, esqueleto-2.1.2, esqueleto-2.1.1, esqueleto-2.1.0 (conflict: persistent==2.8.2, esqueleto => persistent>=2.1 && <2.2) [__6] rejecting: esqueleto-2.0.3 (conflict: persistent==2.8.2, esqueleto => persistent>=2.0.8 && <2.1) [__6] rejecting: esqueleto-2.0.2 (conflict: persistent==2.8.2, esqueleto => persistent>=2.0.5 && <2.1) [__6] rejecting: esqueleto-2.0.1, esqueleto-2.0.0 (conflict: persistent==2.8.2, esqueleto => persistent>=2.0.2 && <2.1) [__6] rejecting: esqueleto-1.4.4, esqueleto-1.4.3, esqueleto-1.4.2, esqueleto-1.4.1.3, esqueleto-1.4.1.2, esqueleto-1.4.1, esqueleto-1.4, esqueleto-1.3.12, esqueleto-1.3.11, esqueleto-1.3.10, esqueleto-1.3.9, esqueleto-1.3.8, esqueleto-1.3.7, esqueleto-1.3.6, esqueleto-1.3.5 (conflict: persistent==2.8.2, esqueleto => persistent>=1.3 && <1.4) [__6] rejecting: esqueleto-1.3.4.6, esqueleto-1.3.4.5, esqueleto-1.3.4.4, esqueleto-1.3.4.3 (conflict: persistent==2.8.2, esqueleto => persistent>=1.2 && <1.4) [__6] rejecting: esqueleto-1.3.4.2, esqueleto-1.3.4, esqueleto-1.3.3, esqueleto-1.3.2, esqueleto-1.3.1, esqueleto-1.3, esqueleto-1.2.4, esqueleto-1.2.3, esqueleto-1.2.2.1, esqueleto-1.2.2, esqueleto-1.2.1, esqueleto-1.2 (conflict: persistent==2.8.2, esqueleto => persistent==1.2.*) [__6] rejecting: esqueleto-1.0.8, esqueleto-1.0.7, esqueleto-1.0.6, esqueleto-1.0.5 (conflict: persistent==2.8.2, esqueleto => persistent>=1.1.5 && <1.2) [__6] rejecting: esqueleto-1.0.3, esqueleto-1.0.2, esqueleto-1.0.1, esqueleto-1.0 (conflict: persistent==2.8.2, esqueleto => persistent==1.1.*) [__6] rejecting: esqueleto-0.2.9, esqueleto-0.2.8, esqueleto-0.2.7, esqueleto-0.2.6, esqueleto-0.2.5, esqueleto-0.2.4, esqueleto-0.2.3, esqueleto-0.2.2, esqueleto-0.2.1, esqueleto-0.2, esqueleto-0.1 (conflict: persistent==2.8.2, esqueleto => persistent>=1.0.1 && <1.1) [__6] rejecting: esqueleto-1.4.1.1 (conflict: persistent==2.8.2, esqueleto => persistent>=1.3 && <1.4) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: espial, yesod-core, base, esqueleto, persistent, yesod-persistent, yesod-form, yesod-static