diff --git a/lib/utils.js b/lib/utils.js
index 3515f0ea6..10a4a35c2 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -88,13 +88,13 @@ function validate_metadata(object, name) {
  * @return {String} base registry url
  */
 function combineBaseUrl(protocol, host, prefix) {
-	let result = '@{protocol}://@{host}';
+	let result = '${protocol}://${host}';
 
 	if (prefix) {
 		prefix = prefix.replace(/\/$/, '');
 
 		result = (prefix.indexOf('/') === 0)
-			? '@{result}@{prefix}'
+			? '${result}${prefix}'
 			: prefix;
 	}