How to install an npm package from GitHub directly?

Question

Trying to install modules from github results in:

ENOENT error on package.json.

Easily reproduced using express:

Answer 1

The current top answer by Peter Lyons is not relevant with recent NPM versions. For example, using the same command that was criticized in this answer is now fine.

$ npm install https://github.com/visionmedia/express

If you have continued problems it might be a problem with whatever package you were using.