e.g. https://integration.wikimedia.org/ci/job/mwgate-npm-node-6-docker/23778/console
07:18:02 + exec docker run --rm --env-file /dev/fd/63 --volume /srv/jenkins-workspace/workspace/mwgate-npm-node-6-docker@2/cache:/cache docker-registry.wikimedia.org/releng/castor:0.1.3 load 07:18:02 ++ /usr/bin/env 07:18:02 ++ egrep -v '^(HOME|SHELL|PATH|LOGNAME|MAIL|HHVM_REPO_CENTRAL_PATH)=' 07:18:03 Defined: CASTOR_NAMESPACE="castor-mw-ext-and-skins/master/mwgate-npm-node-6-docker" 07:18:03 Syncing... 07:18:03 rsync: failed to set times on "/cache/.": Operation not permitted (1) 07:23:24 rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1668) [generator=3.1.2] 07:23:24 07:23:24 Done
The whole npm install job would probably install and execute faster than that with no cache :(