Unable to install on Debian buster

[stdcerr]

Hi, I'm trying to get duplicity setup on my Raspberry Pi running on Debian Buster (10) but I get the following on python setup.py install:

  File "/usr/lib/python2.7/dist-packages/setuptools/sandbox.py", line 166, in save_modules
    saved_exc.resume()
  File "/usr/lib/python2.7/dist-packages/setuptools/sandbox.py", line 141, in resume
    six.reraise(type, exc, self._tb)
  File "/usr/lib/python2.7/dist-packages/setuptools/sandbox.py", line 154, in save_modules
    yield saved
  File "/usr/lib/python2.7/dist-packages/setuptools/sandbox.py", line 195, in setup_context
    yield
  File "/usr/lib/python2.7/dist-packages/setuptools/sandbox.py", line 250, in run_setup
    _execfile(setup_script, ns)
  File "/usr/lib/python2.7/dist-packages/setuptools/sandbox.py", line 44, in _execfile
    code = compile(script, filename, 'exec')
  File "/tmp/easy_install-TbNNgF/pytest-runner-5.3.1/temp/easy_install-9Y1fYx/setuptools_scm-6.3.2/setup.py", line 22                                             
    f"{type(self).__name__} is forbidden, "
                                          ^
SyntaxError: invalid syntax