node: Fix path-based local package detection

Author: hexchain

node/flatpak_node_generator/providers/npm.py

@@ -110,7 +110,7 @@ def _process_packages_v2(
             source: PackageSource
             package_json_path = lockfile.parent / install_path / 'package.json'
             if (
-                'node_modules' not in package_json_path.parents
+                'node_modules' not in install_path.split('/')
                 and package_json_path.exists()
             ):
                 source = LocalSource(path=install_path)