Visualize a Haskell project's dependency graph using Graphviz dot.
With stackage-build, multiple packages can't be grouped into
a project using the stackage-build.config file. stackage-dot shows
the dependency graph between each package listed in
stackage-build.config. If stackage-cli is installed, then usage is
as follows:
$ cd /path/to/project
$ stackage dot > graph.dot
$ dot -Tpng < graph.dot > graph.png