When Cargo.lock changes, generated-sources.json must be updated and that's from https://github.com/flatpak/flatpak-builder-tools/blob/master/cargo/flatpak-cargo-generator.py.
When Cargo.lock changes, generated-sources.json must be updated and that's from https://github.com/flatpak/flatpak-builder-tools/blob/master/cargo/flatpak-cargo-generator.py.