duplicity 0.7.19-1, python-fasteners 0.16.3-1: Missing dependency python-monotonic?

[Christian Franke]

Testcase:

$ cygcheck -f /usr/bin/duplicity
duplicity-0.7.19-1

$ duplicity --version
Traceback (most recent call last):
   File "/usr/bin/duplicity", line 42, in <module>
     import fasteners
   File "/usr/lib/python2.7/site-packages/fasteners/__init__.py", line 
23, in <module>
     from fasteners.lock import locked  # noqa
   File "/usr/lib/python2.7/site-packages/fasteners/lock.py", line 24, 
in <module>
     from fasteners import _utils
   File "/usr/lib/python2.7/site-packages/fasteners/_utils.py", line 42, 
in <module>
     from monotonic import monotonic as now  # noqa
ImportError: No module named monotonic

$ sed -n '39,42p' /usr/lib/python2.7/site-packages/fasteners/_utils.py
try:
     from time import monotonic as now
except (ImportError, AttributeError):
     from monotonic import monotonic as now  # noqa

AFAICS time.monotonic() is not available for python2 and no 
python*-monotonic package is available for Cygwin.

Regards,
Christian