We have the latest stable Node.JS package in our repos, but not the accompanying `npm` package:
```
$ apt-cache madison npm
npm | 1.4.21+ds-2 | http://mirrors.wikimedia.org/debian/ jessie/main amd64 Packages
npm | 1.4.21+ds-2 | http://mirrors.wikimedia.org/debian/ jessie/main Sources
$ apt-cache madison nodejs
nodejs | 4.2.4~dfsg-1~bpo8+1 | http://apt.wikimedia.org/wikimedia/ jessie-wikimedia/main amd64 Packages
nodejs | 0.10.29~dfsg-2 | http://mirrors.wikimedia.org/debian/ jessie/main amd64 Packages
nodejs | 0.10.29~dfsg-2 | http://mirrors.wikimedia.org/debian/ jessie/main Sources
nodejs | 4.2.4~dfsg-1~bpo8+1 | http://apt.wikimedia.org/wikimedia/ jessie-wikimedia/main Sources
```
This causes problems when you want to do `npm install` (e.g.) on a Jessie box.
Unfortunately, for some reason it seems that the Debian folks haven't released a new `npm` package yet. A [quick search](https://packages.debian.org/search?keywords=npm) reveals that //stable//, //testing// and //unstable// all have the same package version - 1.4.21+ds-2