$ cp ../../../coverage-linux/coverage.* .
$ ls coverage.*
coverage.tests-debian-9
coverage.tests-fedora-27
coverage.tests-fedora-28
coverage.tests-unix
$ coverage combine --rcfile=../.coveragerc -a coverage.*
/bin/bash: line 88: coverage: command not found
section_end:1546485959:build_script
section_start:1546485959:after_script
section_end:1546485961:after_script
section_start:1546485961:upload_artifacts_on_failure
section_end:1546485962:upload_artifacts_on_failure
ERROR: Job failed: exit code 1
