diff --git a/package.json b/package.json
index 3a2cd5f6..a1418c67 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "extract-dependency-licenses": "./scripts/extract-dependency-licenses.sh",
     "verify-dependency-licenses-extract": "yarn extract-dependency-licenses && ./scripts/verify-dependency-licenses.sh",
     "deprecate": "ts-node scripts/deprecate_release.ts",
-    "postinstall": "echo 'export default [' > scripts/components/private_packages.ts && grep -l packages/*/package.json -e '\"private\": \"\\?true\"\\?' | xargs cat | jq .name | tr -s '\\n' ',' >> scripts/components/private_packages.ts && echo '];' >> scripts/components/private_packages.ts"
+    "postinstall": "./scripts/postinstall.sh"
   },
   "bugs": {
     "url": "https://github.com/aws-amplify/amplify-codegen/issues"
diff --git a/scripts/postinstall.sh b/scripts/postinstall.sh
new file mode 100755
index 00000000..c7795113
--- /dev/null
+++ b/scripts/postinstall.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+echo 'export default [' > scripts/components/private_packages.ts
+grep -l packages/*/package.json -e '"private": "\?true"\?' | xargs cat | jq .name | tr -s '\n' ',' >> scripts/components/private_packages.ts 
+echo '];' >> scripts/components/private_packages.ts