reduce number of layers

7 jobs for stretch in 3 minutes and 28 seconds (queued for 1 minute and 17 seconds)
Status Job ID Name Coverage
  Docker
passed #628513
docker:build

00:03:28

 
  Rebuild
passed rebuild:builder

passed rebuild:lalsuite-dev

passed rebuild:software

passed rebuild:ssh

passed rebuild:stretch

passed rebuild:stretch-proposed