npm install local, tested on Ubuntu, is very likely on Windows (in git bash) will work too.

npm_install_local

#!/bin/bash

# curl -sL https://deb.nodesource.com/setup_0.10 | sudo bash -
# or
# wget -qO- https://deb.nodesource.com/setup_0.10 | sudo bash -
# or
# curl -sL https://deb.nodesource.com/setup_0.12 | sudo bash -
# or
# wget -qO- https://deb.nodesource.com/setup_0.12 | sudo bash - 
# sudo apt-get install -qq -y nodejs

echo "prefix=~/.local" > ~/.npmrc
echo "export NODE_PATH=\$NODE_PATH:~/.local/lib/node_modules" >>  ~/.bashrc
echo "export PATH=~/.local/bin:\$PATH" >>  ~/.bashrc
echo "export PATH=./node_modules/.bin:\$PATH" >>  ~/.bashrc
source ~/.bashrc

npm i -g npm

# relogin terminal