Resolving dependencies... cabal: Could not resolve dependencies: next goal: happstack-authenticate (user goal) rejecting: happstack-authenticate-2.3.0, 2.2.0, 2.1.5, 2.1.4, 2.1.3, 0.10.16, 0.10.15, 0.10.14, 0.10.13, 0.10.12, 0.10.11, 0.10.10, 0.10.9, 0.10.8, 0.10.7, 0.10.5, 0.10.4, 0.10.3, 0.10.1, 0.9.8 (global constraint requires ==0.9.7) trying: happstack-authenticate-0.9.7 trying: web-routes-0.27.9 (dependency of happstack-authenticate-0.9.7) trying: utf8-string-1.0.1.1 (dependency of web-routes-0.27.9) next goal: reform-happstack (dependency of happstack-authenticate-0.9.7) rejecting: reform-happstack-0.2.5, 0.2.4, 0.2.3, 0.2.2, 0.2.1, 0.2.0 (conflict: happstack-authenticate => reform-happstack==0.1.*) rejecting: reform-happstack-0.1.2, 0.1.1, 0.1 (conflict: utf8-string==1.0.1.1, reform-happstack => utf8-string==0.3.*) Dependency tree exhaustively searched.