diff --git a/config/exceptions.yaml b/config/exceptions.yaml
index db199bd25c3..4dc7bf906ff 100644
--- a/config/exceptions.yaml
+++ b/config/exceptions.yaml
@@ -24,4 +24,7 @@ packageJson:
   css-theme:
     main: dist/theme.css
     module: '!'
+  utils:
+    # react-scripts doesn't handle .mjs files correctly
+    module: '!'
 
diff --git a/config/scripts.yaml b/config/scripts.yaml
index 54a8b702e71..72923876c84 100644
--- a/config/scripts.yaml
+++ b/config/scripts.yaml
@@ -30,4 +30,8 @@ core:
   coverage: "BABEL_ENV=production nyc npm test && nyc report --reporter=text-lcov > coverage.lcov && ./node_modules/.bin/codecov"
 pattern-info:
   prebuild: "node src/prebuild.js"
+utils:
+  # react-scripts doesn't handle .mjs files correctly
+  modulebuild: '!'
+  build: "npm run clean && npm run nodebuild"