Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: cabal-macosx (user goal)
rejecting: cabal-macosx-0.2.3.1, 0.2.3, 0.2.2, 0.2 (global constraint requires
==0.1.2.2)
trying: cabal-macosx-0.1.2.2
trying: base-4.8.1.0/installed-4f7... (dependency of cabal-macosx-0.1.2.2)
next goal: fgl (dependency of cabal-macosx-0.1.2.2)
rejecting: fgl-5.5.2.3, 5.5.2.2, 5.5.2.1, 5.5.2.0, 5.5.1.0, 5.5.0.1, 5.5.0.0
(conflict: cabal-macosx => fgl>=5.4.2.2 && <5.5)
rejecting: fgl-5.4.2.4 (conflict: base==4.8.1.0/installed-4f7..., fgl =>
base<4.8)
rejecting: fgl-5.4.2.3, 5.4.2.2 (conflict: base==4.8.1.0/installed-4f7..., fgl
=> base<4.4)
rejecting: fgl-5.4.2.0, 5.4.1.1, 5.3 (conflict: cabal-macosx => fgl>=5.4.2.2
&& <5.5)
Dependency tree exhaustively searched.