diff --git a/_websrc/gulp_tasks/app/build-pre.js b/_websrc/gulp_tasks/app/build-pre.js
new file mode 100644
index 000000000..505be9ca7
--- /dev/null
+++ b/_websrc/gulp_tasks/app/build-pre.js
@@ -0,0 +1,12 @@
+// Libraries
+// ...
+
+// Module
+module.exports = function () {
+  return new Promise(function(resolve, reject) {
+
+    // ...
+
+    return resolve();
+  });
+}