Installing collected packages: pyflakes, pycodestyle, mccabe, flake8 Successfully installed flake8-3.9.2 mccabe-0.6.1 pycodestyle-2.7.0 pyflakes-2.3.1 WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv $ git diff -U0 origin/master...$CI_COMMIT_SHA | flake8 --diff fatal: ambiguous argument 'origin/master...0edc9f46bb72271aa7e5ee3d66e26eaad45715ad': unknown revision or path not in the working tree. Use '--' to separate paths from revisions, like this: 'git <command> [<revision>...] -- [<file>...]' Cleaning up file based variables ERROR: Job failed: exit code 1