Resolving dependencies... cabal: Could not resolve dependencies: next goal: yesod-auth-oauth2 (user goal) rejecting: yesod-auth-oauth2-0.1.4, 0.1.3, 0.1.2, 0.1.1, 0.1.0, 0.0.12, 0.0.11, 0.0.10, 0.0.9, 0.0.8, 0.0.7, 0.0.6, 0.0.5.1, 0.0.5, 0.0.4 (global constraint requires ==0.0.3) trying: yesod-auth-oauth2-0.0.3 trying: lifted-base-0.2.3.6 (dependency of yesod-auth-oauth2-0.0.3) trying: monad-control-1.0.0.4 (dependency of lifted-base-0.2.3.6) next goal: hoauth2 (dependency of yesod-auth-oauth2-0.0.3) rejecting: hoauth2-0.4.8, 0.4.7, 0.4.6, 0.4.5, 0.4.4, 0.4.3, 0.4.2, 0.4.1, 0.4.0 (conflict: yesod-auth-oauth2 => hoauth2>=0.3.6 && <0.4) rejecting: hoauth2-0.3.7, 0.3.6.1, 0.3.6 (conflict: monad-control==1.0.0.4, hoauth2 => monad-control>=0.3 && <0.4) rejecting: hoauth2-0.3.5, 0.3.0, 0.2.6, 0.2.5.1, 0.2.5, 0.2.4, 0.2.3, 0.2.2, 0.2.0, 0.1.2, 0.1 (conflict: yesod-auth-oauth2 => hoauth2>=0.3.6 && <0.4) Backjump limit reached (change with --max-backjumps).