diff --git a/packages/@aws-cdk/custom-resource-handlers/package.json b/packages/@aws-cdk/custom-resource-handlers/package.json
index f47fdf512f9ff..f778d6e37bf08 100644
--- a/packages/@aws-cdk/custom-resource-handlers/package.json
+++ b/packages/@aws-cdk/custom-resource-handlers/package.json
@@ -4,7 +4,7 @@
   "private": true,
   "version": "0.0.0",
   "scripts": {
-    "build": "tsc -b && node scripts/minify-sources.js",
+    "build": "npx tsc -b && node scripts/minify-sources.js",
     "integ": "integ-runner",
     "lint": "cdk-lint",
     "package": "cdk-package",