diff --git a/package.json b/package.json
index f6206e5c..a00906dc 100644
--- a/package.json
+++ b/package.json
@@ -71,7 +71,7 @@
     "codecov": "codecov",
     "mocha": "mocha -R spec tests",
     "lint": "eslint nunjucks scripts tests",
-    "postinstall": "postinstall-build src",
+    "postinstall": "node scripts/postinstall-build.js src",
     "test:instrument": "cross-env NODE_ENV=test scripts/bundle.js",
     "test:runner": "cross-env NODE_ENV=test scripts/testrunner.js",
     "test": "npm run lint && npm run test:instrument && npm run test:runner"
diff --git a/scripts/postinstall-build.js b/scripts/postinstall-build.js
new file mode 100755
index 00000000..010954f4
--- /dev/null
+++ b/scripts/postinstall-build.js
@@ -0,0 +1,3 @@
+#!/usr/bin/env node
+require('postinstall-build/index')();
+