For example when using S3 to serve static files with combination of less compiler, none of the less converted files are uploaded to S3 since less is a subprocess compile which simply calls lessc command which stores the file locally. Am I doing something wrong with using pipeline in combination with S3? I followed suggestions at https://django-pipeline.readthedocs.io/en/latest/storages.html#using-with-other-storages

here is my storage backend:

from django.contrib.staticfiles.storage import ManifestFilesMixin
from pipeline.storage import PipelineMixin
from storages.backends.s3boto import S3BotoStorage

class StaticS3BotoStorage(PipelineMixin, ManifestFilesMixin, S3BotoStorage):
    pass

from quick glance seems issue could be related to https://github.com/jazzband/django-pipeline/blob/master/pipeline/compilers/__init__.py#L40 since that simply calls the compiler but later on does not use the storage to save that compiled result via django storage.

any ideas?