ci: spécifie explicitement la distribution.

7 jobs for master in 4 minutes and 17 seconds (queued for 4 seconds)
Status Name Job ID Coverage
  Test
passed debian: [buster] #154375
docker

00:01:53

canceled debian: [jessie] #154379
docker

00:01:58

passed debian: [stretch] #154374
docker

00:02:19

failed ubuntu #154378
docker

00:00:18

failed debian: [jessie] #154373
docker

00:02:40

failed ubuntu #154377
docker

00:00:17

failed ubuntu #154376
docker

00:00:14

 
Name Stage Failure
failed
ubuntu Test
Building dependency tree...
Reading state information...
Package gpg is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'gpg' has no installation candidate
Cleaning up file based variables
ERROR: Job failed: exit code 1