Sources.list is now a template

roles/base/tasks/apt.yml

@@ -34,8 +34,8 @@
     - deb_autistici_org.gpg
 
 - name: Install our standard sources.list
-  copy:
-    src: "apt/sources.list"
+  template:
+    src: "sources.list.j2"
     dest: "/etc/apt/sources.list"
 
 - name: Install package repositories

roles/base/files/apt/sources.list → roles/base/templates/sources.list.j2

 deb http://deb.debian.org/debian {{ float_debian_dist }} main contrib non-free
+{% if float_debian_dist == 'stretch' %}
 deb http://deb.debian.org/debian {{ float_debian_dist }}-backports main
+{% endif %}
 deb http://deb.debian.org/debian {{ float_debian_dist }}-updates main contrib non-free
 deb http://security.debian.org/ {{ float_debian_dist }}/updates main contrib non-free