diff --git a/demo_source.sh b/demo_source.sh
index a5e1deb..a7eea46 100755
--- a/demo_source.sh
+++ b/demo_source.sh
@@ -5,9 +5,9 @@
 ## FUNCTIONS
 
 function upgrade {
-  echo UPGRADE
+  echo "UPGRADE: $*"
   if sudo -E "$MIAOU_BASH_DIR"/bin/miaou-bash "$MIAOU_BASH_DIR"/none.sh 3>&1; then
-    echo FAILURE $?
+    echo FAILURE "$@"
   fi
 }
 
@@ -43,7 +43,7 @@ if assert_supported_distro && assert_bash && sudo_root; then
     MIAOU_BASH_DIR=/opt/miaou-bash
     export MIAOU_BASH_DIR
   fi
-  upgrade
+  upgrade "$@"
 else
   >&2 echo "MIAOU_BASH_ERROR: requirements failure"
 fi