Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: barchart (user goal)
rejecting: barchart-0.1.1.1, 0.1.1 (global constraint requires ==0.1)
trying: barchart-0.1
trying: base-4.8.1.0/installed-4f7... (dependency of barchart-0.1)
next goal: diagrams (dependency of barchart-0.1)
rejecting: diagrams-1.3, 1.2, 1.1.0.1, 1.1, 1.0.0.1, 1.0, 0.7.1.1, 0.7.1, 0.7,
0.6, 0.5, 0.4, 0.3 (conflict: barchart => diagrams>=0.2 && <0.3)
rejecting: diagrams-0.2.2.3, 0.2.2.2, 0.2.2.1, 0.2.2, 0.2.1.3, 0.2.1.2,
0.2.1.1, 0.2.1 (conflict: base==4.8.1.0/installed-4f7..., diagrams => base>=2
&& <4.8)
rejecting: diagrams-0.2 (conflict: base==4.8.1.0/installed-4f7..., diagrams =>
base<4.8)
rejecting: diagrams-0.1 (conflict: barchart => diagrams>=0.2 && <0.3)
Dependency tree exhaustively searched.