diff --git a/setup.py b/setup.py
index 908a2ac1..960ff2e4 100644
--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,7 @@
 
 # Representative files that should exist after a successful build
 jstargets = [
-    pjoin(HERE, "lib", "plugin.js"),
+    pjoin(lab_path, "package.json"),
 ]
 
 package_data_spec = {name: ["labextension/*"]}