Nodejs development trick

I am developing an app . I have pushed out most of the functionality of the app in modules. The modules are relatively application specific - but they would allow someone to create a similar/slightly different app without having to deal/change much of the module-encapsulated code.
Any this has resulted in a 2 level deep dependence
 app depends on module1
module1 depends on module2.

To keep things developped in parallel modules are alredy in repos.. and published as they advance.
When I need to do some concurrent development across modules/apps how do I do it.

Here is my trick
I have cloned the repos of all three app, module1, module2 above.
I have run npm install in the app where I prefer to work
I run
> nodemon index.js 
in the app.
I remove the (sole code ) index.js in the node_modules and replace them with a soft link to the repos..
> cd node_modules/module1
> rm index.js
> ln -s ../../../module1/index.js .
> cd ../..
I do the same for the deeper module as well:
> cd node_modules/module1/node_modules/module2
> rm index.js
> ln -s ../../../../../module2/index.js .

At this point I can edit the module's index.js inside their own repos...as I would have like to do and the changes are automatically reflected in my app repo. Nodemon is smart , it does anyway a recursive decent and follows the symlinks... saving my index.js in the module repo results in nodemon restarting my app. 

The only problem is I need to remember and not do any destructive operations on the node_modules tree.