diff --git a/projects/nat-flixel-desktop-playground/Project.xml b/projects/nat-flixel-desktop-playground/Project.xml
index 50abff64..469f6b87 100644
--- a/projects/nat-flixel-desktop-playground/Project.xml
+++ b/projects/nat-flixel-desktop-playground/Project.xml
@@ -31,7 +31,8 @@
 	<classpath name="source" />
 	<assets path="assets" />
 	<!-- IMPORTANT: This copies the #extern scripts generated by NAT into the project output folders: -->
-	<postbuild command="copy-extern-scripts.sh" />
+	<postbuild command="copy-extern-scripts.sh" unless="no-extern"/>
+
 	<!-- _______________________________ Libraries ______________________________ -->
 
 	<haxelib name="flixel" />