Resolving dependencies... cabal: Could not resolve dependencies: next goal: mathblog (user goal) rejecting: mathblog-0.6, mathblog-0.5, mathblog-0.4, mathblog-0.3, mathblog-0.2 (constraint from user target requires ==0.1) trying: mathblog-0.1 trying: base-4.9.0.0/installed-4.9... (dependency of mathblog-0.1) next goal: time (dependency of mathblog-0.1) rejecting: time-1.6.0.1/installed-1.6..., time-1.7.0.1, time-1.7, time-1.6.0.1, time-1.6, time-1.5.0.1, time-1.5, time-1.4.2, time-1.4.1, time-1.4.0.2, time-1.4.0.1, time-1.4, time-1.3, time-1.2.0.5, time-1.2.0.4, time-1.2.0.3, time-1.2.0.2, time-1.2.0.1, time-1.2 (conflict: mathblog => time>=1.1 && <1.2) rejecting: time-1.1.4 (conflict: base==4.9.0.0/installed-4.9..., time => base>=4 && <4.7) rejecting: time-1.1.3 (conflict: base==4.9.0.0/installed-4.9..., time => base>=3 && <4.7 || <3) rejecting: time-1.1.2.4, time-1.1.2.3 (conflict: base==4.9.0.0/installed-4.9..., time => base>=2 && <4.9) rejecting: time-1.1.2.2, time-1.1.2.1, time-1.1.2.0 (conflict: base==4.9.0.0/installed-4.9..., time => base>=2 && <4.3) rejecting: time-1.0 (conflict: mathblog => time>=1.1 && <1.2) Dependency tree exhaustively searched.