diff --git a/developer_toolbox/build_flatpak_locally.sh b/developer_toolbox/build_flatpak_locally.sh
new file mode 100755
index 000000000..ac052192b
--- /dev/null
+++ b/developer_toolbox/build_flatpak_locally.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+# WARNING: run this script from the project root folder, not from here!!
+
+flatpak-builder --force-clean --user --install-deps-from=flathub --repo=esde-repo --install builddir net.retrodeck.es-de.yml
\ No newline at end of file