I've got parc-tiger-1 up and running again. It's failing on test_tk, which makes sense, because it's running as a background twisted process, and thus can't access the window server. I should configure that out.
I'm looking for documentation on how to configure the build slave so that it skips this test.
It may be better to try to detect the "no window server" case and skip it in the test itself rather than in the build slave configuration.
Even better would be if Python wouldn't crash when you try to run Tk commands without a window server. Instead of aborting Python, that should raise an exception (which can then be detected as a test skip).