diff --git a/setup.sh b/setup.sh
index b70839c..c77cce6 100644
--- a/setup.sh
+++ b/setup.sh
@@ -18,6 +18,8 @@ function we_are_changerooted () {
 }
 
 function update_pacman_db () {
+    # In an ISO and for the minimal number of packages we need we do not
+    # care about partial upgrades
     pacman -Sy
 }