Install forked snowpack in existing project

[dpmccabe]

I'm trying to replace the version of snowpack in an existing project with a forked version (note to maintainers: please merge some of the pull requests) and when I run npm uninstall snowpack and npm install --save-dev snowpackjs/snowpack (or from any other Github account) I get this in my package.json:

"devDependencies": {
    "root": "github:snowpackjs/snowpack",
}

Why is it erroneously called root? This issue is, as you can imagine, just about impossible to Google.

My scripts section is the default:

  "scripts": {
    "start": "snowpack dev",
    "build": "snowpack build"
  },

Naturally, when I try npm start now I get snowpack: command not found. I must be misunderstanding something really basic about NPM...