INFO:root:Workspace dir: /var/lib/jenkins/workspace/charm_lint_check
INFO:root:Reading file: Makefile
INFO:root:Searching for: ['@flake8', '/flake8']
INFO:root:command:  make -f Makefile lint
hooks/neutron_api_hooks.py:9:1: F401 'charm_dir' imported but unused
make: *** [lint] Error 1
ERROR:root:Make target returned non-zero.