Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: diagrams (user goal)
rejecting: diagrams-1.4, diagrams-1.3.0.1, diagrams-1.3, diagrams-1.2,
diagrams-1.1.0.1, diagrams-1.1, diagrams-1.0.0.1, diagrams-1.0,
diagrams-0.7.1.1, diagrams-0.7.1, diagrams-0.7, diagrams-0.6, diagrams-0.5,
diagrams-0.4, diagrams-0.3, diagrams-0.2.2.3, diagrams-0.2.2.2,
diagrams-0.2.2.1, diagrams-0.2.2, diagrams-0.2.1.3, diagrams-0.2.1.2,
diagrams-0.2.1.1 (constraint from user target requires ==0.2.1)
trying: diagrams-0.2.1
next goal: base (dependency of diagrams-0.2.1)
rejecting: base-4.9.0.0/installed-4.9... (conflict: diagrams => base>=2 &&
<4.8)
rejecting: base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0,
base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0,
base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0,
base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0,
base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable
package requires installed instance)
Dependency tree exhaustively searched.