diff --git a/demo_source.sh b/demo_source.sh
index ca7d8f4..f384606 100755
--- a/demo_source.sh
+++ b/demo_source.sh
@@ -8,6 +8,10 @@ function upgrade {
   echo "UPGRADE: $*"
   if sudo -E "$MIAOU_BASH_DIR"/bin/miaou-bash "$MIAOU_BASH_DIR"/none.sh 3>&1; then
     :
+  else
+    >&2 echo "SORRY: installation process (version 0.0.0) has failed!"
+    >&2 echo "Either retry later when a next version will come up"
+    >&2 echo "Or report the errorstack printed out above by sending an email to: contact@artcode.re"
   fi
 }