Can't run with Python3.6 on Debian

[mladenkn]

When I try to run Dreampie with Python3.6 (e.g. dreampie python-3.6), I get the following error:
Gtk-Message: Failed to load module "canberra-gtk-module"
Traceback (most recent call last):
File "/usr/bin/dreampie", line 4, in
main()
File "/usr/share/dreampie/dreampielib/gui/init.py", line 1486, in main
_dp = DreamPie(pyexec, opts.runfile)
File "/usr/share/dreampie/dreampielib/gui/init.py", line 239, in init
self.subp.start()
File "/usr/share/dreampie/dreampielib/gui/subprocess_handler.py", line 134, in start
env=env)
File "/usr/lib/python2.7/subprocess.py", line 710, in init
errread, errwrite)
File "/usr/lib/python2.7/subprocess.py", line 1335, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory
Gtk-Message: Failed to load module "canberra-gtk-module"

Dont' worry about Gtk-Message, I get that whenever I run a GUI app I think.