diff --git a/src/installer.js b/src/installer.js
index 384fed205..1d7a6cbfd 100644
--- a/src/installer.js
+++ b/src/installer.js
@@ -79,7 +79,7 @@ function ensureVersion(args, callback) {
     assert.strictEqual(typeof args, 'object');
     assert.strictEqual(typeof callback, 'function');
 
-    if (args.sourceTarballUrl) return callback(null, args.sourceTarballUrl);
+    if (args.sourceTarballUrl) return callback(null, args);
 
     if (!args.data.boxVersionsUrl) return callback(new Error('No boxVersionsUrl specified'));