diff --git a/stacks/ubuntu.yaml b/stacks/ubuntu.yaml
index 777082f..a76fbab 100644
--- a/stacks/ubuntu.yaml
+++ b/stacks/ubuntu.yaml
@@ -2,4 +2,4 @@ name: ubuntu
 base: ubuntu:latest
 packages: []
 pkgmanager: apt
-builtin: false
+builtin: true