diff --git a/build-system/tasks/helpers.js b/build-system/tasks/helpers.js
index 9b3c550e00b4e..6a2984278f20f 100644
--- a/build-system/tasks/helpers.js
+++ b/build-system/tasks/helpers.js
@@ -812,7 +812,10 @@ function shouldUseClosure() {
   // the release process automatically. Since this experiment is actually on the build system
   // itself instead of runtime, it is never run through babel (where the replacements usually happen).
   // Therefore we must compute this one by hand.
-  return argv.define_experiment_constant !== 'ESBUILD_COMPILATION';
+  // return argv.define_experiment_constant !== 'ESBUILD_COMPILATION';
+
+  // TODO: reenable experiment after fixing combineWithCompiledFile for esbuild flow.
+  return false;
 }
 
 module.exports = {