Can buildbots open a window?

Tue Jan 22 13:48:04 UTC 2019

In trying to fix one bug [1], I seem to have created another [2].
I have been unable to fix the second bug, so I am revisiting the first.

When building, octave tries to open a window (using Qt).
As far as I can tell, this caused an error with the buildbots [1].
Is it true that the buildbots cannot open a window?
If so, can anyone think of a workaround?

Thanks,
Marcus

[1] https://trac.macports.org/ticket/57288
[2] https://trac.macports.org/ticket/57850