/usr/lib/python2.7/dist-packages/tryton/plugins/workflow/__init__.py is in tryton-client 2.2.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/tryton/plugins/workflow/../../../../../../share/pyshared/tryton/plugins/workflow/__init__.py