Ways to reproduce:

1. Clone the repository.
2. Follow developer-setup guidelines.
3. Makefile.local was not running somehow, so I renamed that as Makefile itself and then executed make commands.

I invoked the make run-django-webpack-devserver command from my root directory named swh.
Here is the snapshot of the directory structure.

The file is being generated in the swh/static location instead of finding out the subdirectory of static located inside swh-web. It might be due to the same directory name (swh), however, it should not be the case. Ideally, it works after placing it within the static folder of swh-environment.