README unclear

[midenok]

1. From which directory to run:

npm install github-labels -g

?

From /home/midenok/src/extra/github-labels:

npm ERR! Refusing to install github-labels as a dependency of itself
npm ERR! 
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>

From /home/midenok/src/extra:

npm WARN enoent ENOENT: no such file or directory, open '/home/midenok/src/extra/package.json'
npm WARN extra No description
npm WARN extra No repository field.
npm WARN extra No README data
npm WARN extra No license field.

2. Can it be run without -g ? How to execute labels then?