Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: diagrams-canvas (user goal)
rejecting: diagrams-canvas-1.3.0.2 (global constraint requires ==1.3.0.1)
trying: diagrams-canvas-1.3.0.1
trying: base-4.8.1.0/installed-4f7... (dependency of diagrams-canvas-1.3.0.1)
next goal: blank-canvas (dependency of diagrams-canvas-1.3.0.1)
rejecting: blank-canvas-0.5 (conflict: base==4.8.1.0/installed-4f7...,
blank-canvas => base>=4.3.1 && <4.8)
rejecting: blank-canvas-0.4.0, 0.3.1, 0.2.3.2, 0.2.3.1, 0.2.3, 0.2.2, 0.2.0.1,
0.2.0 (conflict: diagrams-canvas => blank-canvas>=0.5 && <0.6)
Dependency tree exhaustively searched.