diff --git a/setup.sh b/setup.sh
index 4bf0862..defb4df 100755
--- a/setup.sh
+++ b/setup.sh
@@ -107,7 +107,7 @@ function write_config()
     env "${new_vars[@]}" envsubst "$vars" < "$src" > "$temp" || { rm -f "$temp"; exit 1; }
     chmod "$mode" "$temp" || { rm -f "$temp"; exit 1; }
     chown "$owner" "$temp" || { rm -f "$temp"; exit 1; }
-    if mv -n -T "$temp" "$dest"; then
+    if [[ ! -f "$dest" ]] && mv -v -T "$temp" "$dest"; then
         return 0
     fi
     if diff -u --label="expanded $src" "$temp" "$dest"; then