Resolving dependencies... cabal: Could not resolve dependencies: next goal: statistics (user goal) rejecting: statistics-0.13.2.3, 0.13.2.2, 0.13.2.1, 0.13.2.0, 0.13.1.1, 0.13.1.0, 0.12.0.0, 0.11.0.3, 0.11.0.2, 0.11.0.1, 0.11.0.0, 0.10.5.2, 0.10.5.1, 0.10.5.0, 0.10.4.1, 0.10.4.0, 0.10.3.1, 0.10.3.0, 0.10.2.0, 0.10.1.0, 0.10.0.1, 0.10.0.0, 0.9.0.0, 0.8.0.5, 0.8.0.4, 0.8.0.3 (global constraint requires ==0.8.0.2) trying: statistics-0.8.0.2 trying: base-4.8.1.0/installed-4f7... (dependency of statistics-0.8.0.2) next goal: vector-algorithms (dependency of statistics-0.8.0.2) rejecting: vector-algorithms-0.7.0.1, 0.7, 0.6.0.4, 0.6.0.3, 0.6.0.2, 0.6.0.1, 0.5.4.2, 0.5.4.1, 0.5.4, 0.5.3.1, 0.5.3, 0.5.2, 0.5.1, 0.5.0, 0.4 (conflict: statistics => vector-algorithms>=0.3.2 && <0.4) trying: vector-algorithms-0.3.4 next goal: vector (dependency of statistics-0.8.0.2) rejecting: vector-0.11.0.0, 0.10.12.3, 0.10.12.2, 0.10.12.1, 0.10.11.0, 0.10.10.0, 0.10.9.2, 0.10.9.1, 0.10.9.0, 0.10.0.1, 0.10, 0.9.1, 0.9, 0.8 (conflict: vector-algorithms => vector>=0.5 && <0.8) trying: vector-0.7.1 next goal: primitive (dependency of statistics-0.8.0.2) rejecting: primitive-0.6.1.0, 0.5.4.0, 0.5.3.0, 0.5.2.1, 0.5.1.0, 0.5.0.1, 0.5, 0.4.1, 0.4.0.1, 0.4 (conflict: vector-algorithms => primitive>=0.2 && <0.4) rejecting: primitive-0.3.1 (conflict: base==4.8.1.0/installed-4f7..., primitive => base>=4 && <4.7) rejecting: primitive-0.3 (conflict: vector => primitive>=0.3.1 && <0.4) rejecting: primitive-0.2.1, 0.2, 0.1 (conflict: statistics => primitive>=0.3) rejecting: primitive-0.6 (conflict: vector-algorithms => primitive>=0.2 && <0.4) Dependency tree exhaustively searched.