diff --git a/website/pages/docs/builders/docker.mdx b/website/pages/docs/builders/docker.mdx
index 67f0fdb4d..afbe237b2 100644
--- a/website/pages/docs/builders/docker.mdx
+++ b/website/pages/docs/builders/docker.mdx
@@ -58,6 +58,10 @@ source "docker" "example" {
     image = "ubuntu"
     export_path = "image.tar"
 }
+
+build {
+  sources = ["source.docker.example"]
+ }
 ```
 
 </Tab>