diff --git a/.gitignore b/.gitignore
index 25b580bc..b7514725 100644
--- a/.gitignore
+++ b/.gitignore
@@ -90,3 +90,6 @@ typings/
 
 # DynamoDB Local files
 .dynamodb/
+
+# IDEs
+.idea/
diff --git a/src/authutil.ts b/src/authutil.ts
index 07e0b24c..3b1f8340 100644
--- a/src/authutil.ts
+++ b/src/authutil.ts
@@ -45,7 +45,8 @@ function writeRegistryToFile(
   }
   // Remove http: or https: from front of registry.
   const authString: string =
-    registryUrl.replace(/(^\w+:|^)/, '') + ':_authToken=${NODE_AUTH_TOKEN}';
+    registryUrl.replace(/(^\w+:|^)/, '')
+    + ':_authToken=' + process.env['NODE_AUTH_TOKEN'];
   const registryString: string = scope
     ? `${scope}:registry=${registryUrl}`
     : `registry=${registryUrl}`;