Resolving dependencies... cabal: Could not resolve dependencies: trying: snaplet-recaptcha-1.0.3 (user goal) trying: http-conduit-2.1.5 (dependency of snaplet-recaptcha-1.0.3) trying: http-client-tls-0.2.2 (dependency of http-conduit-2.1.5) trying: tls-1.2.16 (dependency of http-client-tls-0.2.2) trying: crypto-numbers-0.2.7 (dependency of tls-1.2.16) trying: vector-0.10.12.3 (dependency of crypto-numbers-0.2.7) trying: primitive-0.6 (dependency of vector-0.10.12.3) trying: snap-0.14.0.1 (dependency of snaplet-recaptcha-1.0.3) next goal: vector-algorithms (dependency of snap-0.14.0.1) rejecting: vector-algorithms-0.6.0.3, 0.6.0.2, 0.6.0.1, 0.5.4.2 (conflict: primitive==0.6, vector-algorithms => primitive>=0.3 && <0.6) rejecting: vector-algorithms-0.5.4.1, 0.5.4, 0.5.3.1, 0.5.3 (conflict: vector==0.10.12.3, vector-algorithms => vector>=0.6 && <0.10) rejecting: vector-algorithms-0.5.2, 0.5.1, 0.5.0, 0.4 (conflict: vector==0.10.12.3, vector-algorithms => vector>=0.6 && <0.8) rejecting: vector-algorithms-0.3.4, 0.3.3, 0.3.2, 0.3.1, 0.3 (conflict: snap => vector-algorithms>=0.4 && <0.7) Backjump limit reached (change with --max-backjumps).