Resolving dependencies... cabal: Could not resolve dependencies: next goal: happstack-server-tls (user goal) rejecting: happstack-server-tls-7.1.6, 7.1.5, 7.1.4, 7.1.3, 7.1.2.1, 7.1.1, 7.1.0, 7.0.4, 7.0.3, 7.0.2, 7.0.1, 7.0.0, 6.0.2 (global constraint requires ==6.0.1) trying: happstack-server-tls-6.0.1 trying: base-4.8.1.0/installed-4f7... (dependency of happstack-server-tls-6.0.1) next goal: time (dependency of happstack-server-tls-6.0.1) rejecting: time-1.5.0.1/installed-c20..., 1.5.0.1, 1.5 (conflict: happstack-server-tls => time==1.4.*) trying: time-1.4.2 next goal: deepseq (dependency of time-1.4.2) rejecting: deepseq-1.4.1.1/installed-8fb..., 1.4.1.2, 1.4.1.1, 1.4.1.0, 1.4.0.0 (conflict: time => deepseq>=1.1 && <1.4) rejecting: deepseq-1.3.0.2 (conflict: base==4.8.1.0/installed-4f7..., deepseq => base>=4.3 && <4.8) trying: deepseq-1.3.0.1 next goal: array (dependency of deepseq-1.3.0.1) rejecting: array-0.5.1.0/installed-d42..., 0.5.1.0, 0.5.0.0 (conflict: deepseq => array>=0.1 && <0.5) rejecting: array-0.4.0.1 (conflict: base==4.8.1.0/installed-4f7..., array => base>=4.2 && <4.7) rejecting: array-0.4.0.0 (conflict: base==4.8.1.0/installed-4f7..., array => base>=4.2 && <4.6) rejecting: array-0.3.0.3 (conflict: base==4.8.1.0/installed-4f7..., array => base>=4.2 && <4.5) rejecting: array-0.3.0.2, 0.3.0.1 (conflict: base==4.8.1.0/installed-4f7..., array => base>=4.2 && <4.4) rejecting: array-0.3.0.0 (conflict: base==4.8.1.0/installed-4f7..., array => base>=3 && <4.4) rejecting: array-0.2.0.0, 0.1.0.0 (conflict: base==4.8.1.0/installed-4f7..., array => base<4.3) Dependency tree exhaustively searched.