diff --git a/release/tools/vmimage.subr b/release/tools/vmimage.subr
--- a/release/tools/vmimage.subr
+++ b/release/tools/vmimage.subr
@@ -53,6 +53,7 @@
 
 vm_copy_base() {
 	# Defunct
+	return 0
 }
 
 vm_install_base() {