Resolving dependencies... cabal: Could not resolve dependencies: next goal: PrimitiveArray (user goal) rejecting: PrimitiveArray-0.7.1.0, PrimitiveArray-0.7.0.1, PrimitiveArray-0.7.0.0, PrimitiveArray-0.6.1.0, PrimitiveArray-0.6.0.0, PrimitiveArray-0.5.4.0, PrimitiveArray-0.5.3.0, PrimitiveArray-0.5.2.0, PrimitiveArray-0.5.0.0, PrimitiveArray-0.4.0.1, PrimitiveArray-0.4.0.0, PrimitiveArray-0.3.0.0, PrimitiveArray-0.2.2.0, PrimitiveArray-0.2.1.1, PrimitiveArray-0.2.1.0, PrimitiveArray-0.2.0.0, PrimitiveArray-0.1.1.2, PrimitiveArray-0.0.4.0, PrimitiveArray-0.0.3.1, PrimitiveArray-0.0.3.0, PrimitiveArray-0.0.2.2 (constraint from user target requires ==0.0.2.1) trying: PrimitiveArray-0.0.2.1 trying: base-4.9.0.0/installed-4.9... (dependency of PrimitiveArray-0.0.2.1) next goal: primitive (dependency of PrimitiveArray-0.0.2.1) rejecting: primitive-0.6.2.0, primitive-0.6.1.0, primitive-0.5.4.0, primitive-0.5.3.0, primitive-0.5.2.1, primitive-0.5.1.0, primitive-0.5.0.1, primitive-0.5, primitive-0.4.1, primitive-0.4.0.1, primitive-0.4 (conflict: PrimitiveArray => primitive>=0.3 && <0.4) rejecting: primitive-0.3.1, primitive-0.3 (conflict: base==4.9.0.0/installed-4.9..., primitive => base>=4 && <4.7) rejecting: primitive-0.2.1, primitive-0.2, primitive-0.1, primitive-0.6 (conflict: PrimitiveArray => primitive>=0.3 && <0.4) Dependency tree exhaustively searched.