Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: graph-utils (user goal)
rejecting: graph-utils-0.3.7, 0.3.6.1, 0.3.6, 0.3.5.2 (global constraint
requires ==0.3.5.1)
trying: graph-utils-0.3.5.1
next goal: base (dependency of graph-utils-0.3.5.1)
rejecting: base-4.7.0.1/installed-e4b... (conflict: graph-utils => base>=2 &&
<4)
rejecting: base-4.8.0.0, 4.7.0.2, 4.7.0.1, 4.7.0.0, 4.6.0.1, 4.6.0.0, 4.5.1.0,
4.5.0.0, 4.4.1.0, 4.4.0.0, 4.3.1.0, 4.3.0.0, 4.2.0.2, 4.2.0.1, 4.2.0.0,
4.1.0.0, 4.0.0.0, 3.0.3.2, 3.0.3.1 (global constraint requires installed
instance)
Dependency tree exhaustively searched.