Resolving dependencies... cabal: Could not resolve dependencies: next goal: yesod (user goal) rejecting: yesod-1.4.1.5, 1.4.1.4, 1.4.1.3, 1.4.1.2, 1.4.1.1, 1.4.1, 1.4.0, 1.2.6.1, 1.2.6, 1.2.5.3, 1.2.5.2, 1.2.5.1, 1.2.5, 1.2.4, 1.2.3, 1.2.2.1, 1.2.2, 1.2.1.1, 1.2.1, 1.2.0.1, 1.2.0, 1.1.9.4, 1.1.9.3, 1.1.9.2, 1.1.9.1, 1.1.9, 1.1.8.2, 1.1.8.1, 1.1.8, 1.1.7.2, 1.1.7.1, 1.1.7, 1.1.6, 1.1.5, 1.1.4.1, 1.1.4, 1.1.3.1, 1.1.3, 1.1.2, 1.1.1.2, 1.1.1, 1.1.0.3, 1.1.0.2, 1.1.0.1, 1.1.0, 1.0.1.6, 1.0.1.5, 1.0.1.4, 1.0.1.3, 1.0.1.2, 1.0.1.1, 1.0.1, 1.0.0.2, 1.0.0.1, 1.0.0, 0.10.2, 0.10.1.4, 0.10.1.3, 0.10.1.2, 0.10.1.1, 0.10.1, 0.9.4.1, 0.9.4, 0.9.3.4, 0.9.3.3, 0.9.3.2, 0.9.3.1, 0.9.3, 0.9.2.2, 0.9.2.1, 0.9.2, 0.9.1.1, 0.9.1, 0.8.2.1 (global constraint requires ==0.8.2) trying: yesod-0.8.2 next goal: process (dependency of yesod-0.8.2) rejecting: process-1.2.0.0/installed-163... (conflict: process => directory==1.2.1.0/installed-4c4..., yesod => directory>=1.0 && <1.2) trying: process-1.2.3.0 trying: deepseq-1.3.0.2/installed-733... (dependency of process-1.2.3.0) next goal: http-types (dependency of yesod-0.8.2) rejecting: http-types-0.8.6, 0.8.5, 0.8.4, 0.8.3, 0.8.2, 0.8.1, 0.8.0, 0.7.3.0.1, 0.7.3, 0.7.2, 0.7.1, 0.7.0 (conflict: yesod => http-types>=0.6.1 && <0.7) rejecting: http-types-0.6.11, 0.6.10, 0.6.9, 0.6.8 (conflict: deepseq => array==0.5.0.0/installed-98a..., http-types => array>=0.2 && <0.5) rejecting: http-types-0.6.7, 0.6.6, 0.6.5.1, 0.6.5, 0.6.4, 0.6.3 (conflict: deepseq => array==0.5.0.0/installed-98a..., http-types => array>=0.2 && <0.4) rejecting: http-types-0.6.2, 0.6.1 (conflict: deepseq => array==0.5.0.0/installed-98a..., http-types => array>=0.3 && <0.4) rejecting: http-types-0.6.0.1, 0.6.0, 0.5.3, 0.5.2, 0.5.1, 0.5, 0.4.1, 0.4.0, 0.3.1, 0.3.0, 0.2.0, 0.1.1, 0.1 (conflict: yesod => http-types>=0.6.1 && <0.7) Dependency tree exhaustively searched.