ISO builds on Jenkins are fragile since the migration to vagrant-libvirt
E.g. https://jenkins.tails.boum.org/view/RM/job/build_Tails_ISO_devel/lastFailedBuild/console and https://jenkins.tails.boum.org/view/RM/job/build_Tails_ISO_feature-stretch/lastFailedBuild/console.
It would be really nice if this was fixed by the end of the week, so we can rely on Jenkins during the Stretch sprint that starts on Monday (May 15th), hence High priority. In other words: please fix such issues that break our current development workflow before working on bonus improvements :)
Parent Task: #5630 (closed)
Subtasks
Original created by @intrigeri on 12531 (Redmine)