diff --git a/build/tools/serve.js b/build/tools/serve.js
index 960fc18d..09cff2c6 100644
--- a/build/tools/serve.js
+++ b/build/tools/serve.js
@@ -9,9 +9,12 @@ function spawnAndCheck(cmd, args, options) {
   const s = spawn(cmd, args, options);
   spawns.push(s);
   s.on('close', (code) => {
-    console.log(cmd, 'exited with code:', code);
-    spawns.forEach((s) => s.kill());
-    process.exit(code);
+    spawns.splice(spawns.findIndex(s), 1);
+    if (code !== 0) {
+      console.log(cmd, 'exited with code:', code);
+      spawns.forEach((s) => s.kill());
+      process.exit(code);
+    }
   });
 }