I am currently unable to include this project in a rebar3 since the .app.src file contains de mod entry. As mention here this is the entry point for the application module (-behavior(application)). This is only necessary when a supervisor tree need to be created.
When I do include this project as a dependency, I got error like {exited,{bad_return,{{sd_notify,start,[normal,[]]},{'EXIT',{undef,[{sd_notify,start,[normal,[]],[]} which suggest the start method is not found.