How can I force NPM to look for installed packages in different folder?

Messed Docpad installation.

Now Docpad is in /usr/bin/docpad /usr/lib/node_modules

While NPM look at /usr/local/bin/docpad /usr/local/node_modules

Can I specify proper directory for npm where it should look for installed modules?

Solution

Ended up, removing Node.js and npm (installed from docpad scripts).

Installing again node.js and npm from chris-lea/node.js ppa.

Removing docpad by npm from ppa. And then node.js and npm them selfs, and then whole ppa.

Installing node.js and npm from docpad scripts.