diff --git a/roles/repositories/files/preferences.d/20-unstable b/roles/repositories/files/preferences.d/20-unstable
new file mode 100644
--- /dev/null
+++ b/roles/repositories/files/preferences.d/20-unstable
@@ -0,0 +1,3 @@
+Package: *
+Pin: release a=unstable
+Pin-Priority: -1