Missing -c flag in entry point for CI

1 job for master in 27 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
failed #920
build:lektor

00:00:27

 
Name Stage Failure
failed
build:lektor Build
Fetching changes...
HEAD is now at 22db3fb Fixing syntax of CI script
From https://git.mittelab.org/proj/www
22db3fb..f816da5 master -> origin/master
Checking out f816da5c as master...
Skipping Git submodules setup
sh: 1: set: Illegal option -o pipefail
sh: 1: set: Illegal option -o pipefail
ERROR: Job failed: exit code 2