Backports.debian.org

Install Node only

Run the following (as root):

echo "deb http://ftp.us.debian.org/debian wheezy-backports main" >> /etc/apt/sources.list
apt-get update
apt-get install nodejs

Install Node and NPM

Run the following (as root):

echo "deb http://ftp.us.debian.org/debian wheezy-backports main" >> /etc/apt/sources.list
apt-get update
apt-get install nodejs-legacy
curl https://www.npmjs.org/install.sh | sh