If anyone else needs step-by-step instructions, I used the following steps from Install Node.js on Debian Squeeze and it installed with no problems:
sudo apt-get update && sudo apt-get install git-core curl build-essential openssl libssl-dev
git clone https://github.com/nodejs/node.git
cd node
git checkout v5.0.0
(or the version you want to build)./configure
make
sudo make install
node -v
npm -v
I didn’t have to install any additional sources into apt to get it to build.