diff --git a/core/scripts/js/babel-es6-build.js b/core/scripts/js/babel-es6-build.js
index 0bbdfebd546d..647bd870aefc 100644
--- a/core/scripts/js/babel-es6-build.js
+++ b/core/scripts/js/babel-es6-build.js
@@ -22,6 +22,8 @@ const changeOrAdded = require('./changeOrAdded');
 const check = require('./check');
 const log = require('./log');
 
+console.warn('⚠️  yarn `build:js` command is deprecated in drupal:9.4.0 and will be removed from drupal:10.0.0. This command is no longer needed in Drupal 10.0.0 once https://www.drupal.org/project/drupal/issues/3278415 is committed.️');
+
 // Match only on .es6.js files.
 const fileMatch = './**/*.es6.js';
 // Ignore everything in node_modules
diff --git a/core/scripts/js/babel-es6-watch.js b/core/scripts/js/babel-es6-watch.js
index c9d1b147e03e..2fbcfe3196d1 100644
--- a/core/scripts/js/babel-es6-watch.js
+++ b/core/scripts/js/babel-es6-watch.js
@@ -16,6 +16,8 @@ const chokidar = require('chokidar');
 const changeOrAdded = require('./changeOrAdded');
 const log = require('./log');
 
+console.warn('⚠️  yarn `watch:js` command is deprecated in drupal:9.4.0 and will be removed from drupal:10.0.0. This command is no longer needed in Drupal 10.0.0 once https://www.drupal.org/project/drupal/issues/3278415 is committed.️');
+
 // Match only on .es6.js files.
 const fileMatch = './**/*.es6.js';
 // Ignore everything in node_modules