diff --git a/ansible/roles/osmocom-jenkins-slave/tasks/debian.yml b/ansible/roles/osmocom-jenkins-slave/tasks/debian.yml
index 30e4ece5..641c6f33 100644
--- a/ansible/roles/osmocom-jenkins-slave/tasks/debian.yml
+++ b/ansible/roles/osmocom-jenkins-slave/tasks/debian.yml
@@ -22,6 +22,7 @@
     repo: 'deb http://ftp.debian.org/debian jessie-backports main'
     filename: 'backports'
     update_cache: yes
+  when: ansible_distribution == 'Debian' and ansible_distribution_release == 'jessie'
 
 - name: install java for jessie
   apt: