Count GFF Feature tool missing python module

[dnbenso]

error:
Traceback (most recent call last):
File "/mnt/galaxy/shed_tools/toolshed.g2.bx.psu.edu/repos/devteam/count_gff_features/fabda887a71f/count_gff_features/count_gff_features.py", line 6, in
from galaxy.datatypes.util.gff_util import GFFReaderWrapper
File "/mnt/galaxy/galaxy-app/lib/galaxy/datatypes/util/gff_util.py", line 9, in
from galaxy.util.odict import odict
File "/mnt/galaxy/galaxy-app/lib/galaxy/util/init.py", line 30, in
from six import binary_type, iteritems, PY3, string_types, text_type
ImportError: No module named six

FIX:
As galaxy:
source /mnt/galaxy/tools/bx-python/0.7.1/devteam/package_bx_python_0_7/2d0c08728bca/venv/bin/activate
pip install six