[WARN] override template not found:

httpd_1  | $ vhost_gen.py -p "/shared/httpd/sixth_avenue" -n "sixth_avenue" -c /etc/vhost-gen/mass.yml -o "/shared/httpd/sixth_avenue/.devilbox/" -s -v -m both
httpd_1  | [WARN] override template not found:  /shared/httpd/sixth_avenue/.devilbox/nginx.yml

This warning is logged at docker-compose up for every vhost. WTFAIDW?