Windows should wait on factories.py refactor to fix::

    windows = ServoFactory([
        # TODO: convert this to use DynamicServoFactory
        # We need to run each command in a bash login shell, which breaks the
        # heuristics used by DynamicServoFactory.make_step
        steps.Compile(command=make_win_command("./mach build -d -v"),
                      env=envs.build_windows),
        steps.Test(command=make_win_command("./mach test-unit"),
                   env=envs.build_windows),
        # TODO: run lockfile_changed.sh and manifest_changed.sh scripts
    ])