stderr is redirected to stderr, it was stderr->stdout before

ondemand.js

@@ -63,7 +63,7 @@ function process_queue() {
     console.log("ondemand data: " + data);
   });
   proc.stderr.on("data", data => {
-    console.log("ondemand error: " + data);
+    console.error("ondemand error: " + data);
   });
   proc.on("exit", code => {
     working = false;