Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: visual-graphrewrite (user goal)
rejecting: visual-graphrewrite-0.4.0.1, 0.3.2, 0.3.1 (global constraint
requires ==0.3)
trying: visual-graphrewrite-0.3
trying: base-4.8.1.0/installed-4f7... (dependency of visual-graphrewrite-0.3)
next goal: strict-concurrency (dependency of visual-graphrewrite-0.3)
rejecting: strict-concurrency-0.2.4.1, 0.2.4 (conflict:
base==4.8.1.0/installed-4f7..., strict-concurrency => base>=4 && <4.6)
rejecting: strict-concurrency-0.2.3 (conflict: base==4.8.1.0/installed-4f7...,
strict-concurrency => base>=3 && <4.3)
rejecting: strict-concurrency-0.2.2, 0.2.1 (conflict:
base==4.8.1.0/installed-4f7..., strict-concurrency => base>=3 && <4)
rejecting: strict-concurrency-0.2, 0.1 (conflict: visual-graphrewrite =>
strict-concurrency>=0.2.1)
Dependency tree exhaustively searched.