Resolving dependencies... cabal: Could not resolve dependencies: next goal: plot-gtk (user goal) rejecting: plot-gtk-0.2.0.3, 0.2.0.2, 0.2.0.1, 0.2, 0.1.0.11, 0.1.0.10, 0.1.0.9, 0.1.0.8, 0.1.0.6, 0.1.0.5, 0.1.0.4, 0.1.0.3 (global constraint requires ==0.1.0.2) trying: plot-gtk-0.1.0.2 trying: base-4.8.1.0/installed-4f7... (dependency of plot-gtk-0.1.0.2) next goal: plot (dependency of plot-gtk-0.1.0.2) rejecting: plot-0.2.3.5, 0.2.3.4, 0.2.3.3, 0.2.3.2, 0.2.3.1, 0.2.3, 0.2.2, 0.2.1, 0.2 (conflict: plot-gtk => plot<0.2) trying: plot-0.1.8 next goal: MaybeT (dependency of plot-0.1.8) rejecting: MaybeT-0.1.2, 0.1.1 (conflict: base==4.8.1.0/installed-4f7..., MaybeT => base<4.8) rejecting: MaybeT-0.1.0 (conflict: base==4.8.1.0/installed-4f7..., MaybeT => base<4.3) Dependency tree exhaustively searched.