Inbuild -graph doesn't traverse includes from story.ni

inbuild/Tangled/inbuild -graph ~/dev/Inform/BOSH/BOSH1_v9A.inform -internal /Applications/Inform.app/Contents/Resources/Internal -nest ~/dev/Inform/BOSH/BOSH1_v9A.materials -project ~/dev/Inform/BOSH/BOSH1_v9A.inform

produces

[f113] /Users/rileypb/dev/Inform/BOSH/BOSH1_v9A.inform/Build/output.ulx
  --build-> [f112] /Users/rileypb/dev/Inform/BOSH/BOSH1_v9A.inform/Build/auto.inf
    --build-> [f111] /Users/rileypb/dev/Inform/BOSH/BOSH1_v9A.inform/Build/auto.inf
      --build-> [c0] The Bureau of Strange Happenings
        --build-> [f1] /Users/rileypb/dev/Inform/BOSH/BOSH1_v9A.inform/Source/story.ni
        --build-> [c104] BasicInformKit v10.1.2
<SNIP>

but never references any file included by story.ni. Is there something I’m misunderstanding about inbuild? Or some way in which I’m not constructing my command line correctly? I’d really like to get a full listing of extensions included in a project.

The docs seem to state that it does handle extensions. This is the output of an example in the docs:

    [f59] Menu Time.inform/Build/output.ulx
      --build-> [f58] Menu Time.inform/Build/auto.inf
        --build-> [f57] Menu Time.inform/Build/auto.inf
          --build-> [c0] Menu Time.inform
            --build-> [c53] Basic Help Menu by Emily Short
              --use---> [c47] Menus by Emily Short v3
                --use---> [c55] Basic Screen Effects by Emily Short v8
            --build-> [f1] Menu Time.inform/Source/story.ni
            --build-> [c12] BasicInformKit

When I run it, it only acknowledges the existence of Basic Help Menu when it’s missing. Once I add an -internal argument, it disappears altogether from the output.