diff --git a/build.gradle b/build.gradle
index 88fd0d7..7f9d982 100644
--- a/build.gradle
+++ b/build.gradle
@@ -113,6 +113,7 @@ def await(Process proc) {
     def out = new StringBuilder()
     def err = new StringBuilder()
     proc.waitForProcessOutput(out, err)
+    return [out, err, proc.exitValue()]
 }
 
 def shell(String command) {