如何在git项目中开发多个pip包？

I'm developing a django project, using git for code management. The main project has a number of apps as submodules, each of which can be used independently, thus are each in separate git repos. All of these apps are in development, and at least one is forked from another project. These apps are installable through pip, when cloning the repo, there are setup.py and README and so forth in the root, then the actual app in a subfolder. I'm developing a django project, using git for