From NPM #

Deployd modules are 100% compatible with node modules. This means you can install a module with npm from your project's root directory.

cd my-dpd-project
mkdir -p node_modules
npm install my-dpd-module

To find deployd modules available on npm search for dpd.

If you used the Deployd installer, you will need to download node.js in order to use npm.

If you need to use a task manager like Grunt or Gulp for your development environement, you'll have to add a package.json as explained in this page.

From Source #

You can also install a module from source by putting it in your project's node_modules folder. Even a single file is valid (eg: /node_modules/foo.js).