This project is an adaptation of the original MeteorOS, changed from Blaze to React. This should make things much much better.
The current process to set this up is quite convoluted. You need to basically do this.
~ $ npm install -g npm # Make sure that NPM is up to date. This is important!
~ $ git clone https://github.com/jchristman/meteor-os.git
~ $ cd meteor-os/meteor-os
~/meteor-os/meteor-os $ npm install --only=dev
~/meteor-os/meteor-os $ npm link
~/meteor-os/meteor-os $ cd ../gui-designer
~/meteor-os/gui-designer $ npm install
~/meteor-os/gui-designer $ npm link meteor-os
~/meteor-os/gui-designer $ ln -s node_modules/meteor-os/bundle.css bundle.css
~/meteor-os/gui-designer $ meteor reset && meteor