diff --git a/test/upgrade_project/README.md b/test/upgrade_project/README.md
index 4ab439b..8df5383 100644
--- a/test/upgrade_project/README.md
+++ b/test/upgrade_project/README.md
@@ -21,6 +21,7 @@
 
     rebar compile
     rebar generate
+    # previous_release path is relative to your rel directory
     rebar generate-appups previous_release=dummy_0.1
     rebar generate-upgrade previous_release=dummy_0.1
     tar -zvtf rel/dummy_0.2.tar.gz