diff --git a/roles/lmn_network/tasks/main.yml b/roles/lmn_network/tasks/main.yml
index e6ffc15..7a39349 100644
--- a/roles/lmn_network/tasks/main.yml
+++ b/roles/lmn_network/tasks/main.yml
@@ -5,12 +5,14 @@
     mode: '0644'
     content: >
       {{ apt_conf }}
+  when: apt_conf|default(false)
 
 - name: Set NTP server
   ansible.builtin.lineinfile:
     path: /etc/systemd/timesyncd.conf
     insertafter: '^#NTP='
     line: NTP={{ ntp_serv }}
+  when: ntp_serv|default(false)
 
 - name: Add proposed-updates repository
   ansible.builtin.apt_repository: