diff --git a/package.json b/package.json
index 34454a0..8333efc 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
   "description": "Yet another Sass/SCSS plugin for Eleventy. Source maps, PostCSS and revision hashes are supported.",
   "main": "index.js",
   "scripts": {
+    "postinstall": "node scripts/postinstall.js",
     "test": "npx ava --timeout=3m --concurrency=1"
   },
   "repository": {
diff --git a/scripts/postinstall.js b/scripts/postinstall.js
new file mode 100644
index 0000000..5e38cef
--- /dev/null
+++ b/scripts/postinstall.js
@@ -0,0 +1,6 @@
+const { yellow, green } = require("kleur");
+
+console.log(yellow("`eleventy-sass` uses an experimental feature of Node 22 to load Eleventy 3 internal modules. You should add \"--experimental-require-module\" option to your Node commands. Therefore, instead of running `npx @11ty/eleventy`, use the following command:"));
+console.log(green("npx --node-options=\"--experimental-require-module\" @11ty/eleventy"));
+console.log("HOGE");
+console.debug("FOO");