Activity install fails with TypeError

[quozl]

% python3 setup.py install
Traceback (most recent call last):
  File "setup.py", line 21, in <module>
    bundlebuilder.start()
  File "/usr/lib/python3.7/dist-packages/sugar3/activity/bundlebuilder.py", line 633, in start
    globals()['cmd_' + options.command](config, options)
  File "/usr/lib/python3.7/dist-packages/sugar3/activity/bundlebuilder.py", line 513, in cmd_install
    options.install_desktop_file)
  File "/usr/lib/python3.7/dist-packages/sugar3/activity/bundlebuilder.py", line 290, in install
    for f in self.get_files_in_git():
  File "/usr/lib/python3.7/dist-packages/sugar3/activity/bundlebuilder.py", line 209, in get_files_in_git
    stdout.strip('\n').split('\n')]
TypeError: a bytes-like object is required, not 'str'

Workaround is to temporarily move the .git directory.