Resolving dependencies... cabal: Could not resolve dependencies: trying: snaplet-auth-acid-0.1.0 (user goal) trying: vector-0.10.12.3 (dependency of snaplet-auth-acid-0.1.0) trying: primitive-0.6 (dependency of vector-0.10.12.3) trying: transformers-0.3.0.0/installed-16a... (dependency of primitive-0.6) trying: snap-0.14.0.5 (dependency of snaplet-auth-acid-0.1.0) next goal: comonad (dependency of snap-0.14.0.5) rejecting: comonad-4.2.7 (conflict: base==4.7.0.1/installed-e4b..., comonad => base<0) trying: comonad-4.2.6 trying: transformers-compat-0.4.0.4 (dependency of comonad-4.2.6) trying: transformers-compat-0.4.0.4:-two rejecting: transformers-compat-0.4.0.4:-three (conflict: transformers==0.3.0.0/installed-16a..., transformers-compat-0.4.0.4:three => transformers>=0.4.1 && <0.5) rejecting: transformers-compat-0.4.0.4:+three (manual flag can only be changed explicitly) Backjump limit reached (change with --max-backjumps).