diff --git a/x-pack/tasks/build.ts b/x-pack/tasks/build.ts
index a3b08a16f4b08..aaeea9d14e385 100644
--- a/x-pack/tasks/build.ts
+++ b/x-pack/tasks/build.ts
@@ -73,7 +73,7 @@ async function copySourceAndBabelify() {
           '**/*.{test,test.mocks,mock,mocks}.*',
           '**/*.d.ts',
           '**/node_modules/**',
-          '**/public/**',
+          '**/public/**/*.{js,ts,tsx,json}',
           '**/{__tests__,__mocks__,__snapshots__}/**',
           'plugins/canvas/shareable_runtime/test/**',
         ],