diff --git a/recipes/engine/engine.proto b/recipes/engine/engine.proto
index b6f7ab0..35b2951 100644
--- a/recipes/engine/engine.proto
+++ b/recipes/engine/engine.proto
@@ -69,6 +69,8 @@
   // emulator architecture to run tests on
   // Currently only used by femu_test
   string emulator_arch = 32;
+
+  string repository = 33;
 }
 
 message EnvProperties {