Resolving dependencies... cabal: Could not resolve dependencies: next goal: gitit (user goal) rejecting: gitit-0.10.6.3, 0.10.6.2, 0.10.6.1, 0.10.6, 0.10.5.1, 0.10.5, 0.10.4, 0.10.3.1, 0.10.3, 0.10.2, 0.10.1.2, 0.10.1.1, 0.10.1 (global constraint requires ==0.10.0.2) trying: gitit-0.10.0.2 trying: xss-sanitize-0.3.5.5 (dependency of gitit-0.10.0.2) trying: attoparsec-0.13.0.0 (dependency of xss-sanitize-0.3.5.5) trying: transformers-0.3.0.0/installed-16a... (dependency of attoparsec-0.13.0.0) next goal: happstack-server (dependency of gitit-0.10.0.2) rejecting: happstack-server-7.4.4, 7.4.3, 7.4.2, 7.4.1, 7.4.0, 7.3.9, 7.3.8, 7.3.7, 7.3.6, 7.3.5, 7.3.4, 7.3.3, 7.3.2, 7.3.1, 7.3.0 (conflict: gitit => happstack-server>=7.0 && <7.2) trying: happstack-server-7.1.7.1 trying: transformers-base-0.4.4 (dependency of happstack-server-7.1.7.1) trying: transformers-compat-0.4.0.4 (dependency of transformers-base-0.4.4) 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).