diff --git a/index.js b/index.js
index 84b4100..1590abd 100644
--- a/index.js
+++ b/index.js
@@ -1,4 +1,5 @@
 const { exec } = require('child_process');
+var additional = process.env.INPUT_ADDITIONAL;
 exec('apk add bash git ' + additional, (error, stdout, stderr) => {
   if (error) {
     console.error(`Error: ${error.message}`);