Comment 7 for bug 1768233

Thanks for the workaround suggestion. To relate this back to the specific problem I have been facing - the part2 from the example has actually been a plainbox_provider plugin part. Hence, I have tried locally making a change to the plugin itself and the following stage_packages as 'builtins' (only adding setuptools didnt seem to work for me):

    def __init__(self, name, options, project):
...
+ self.stage_packages.extend(['python3-pip', 'python3-wheel', 'python3-setuptools'])

    def build(self):
        super().build()

This gets our previous working builds going again, which is great. Does it seem reasonable to carry this in the plugin to you? I think it is acceptable.