nodesource/distributions — pull request #19 by wblankenship (2014-10-07 04:39:38+00:00)
Title: Ensures aptitude cache is populated before running lsb-release

Justification:

```
$ lsb_release -c -s
jessie
$ rm -rf /var/lib/apt/lists/*
$ lsb_release -c -s
n/a
$ apt-get update
...
Reading package lists... Done
$ lsb_release -c -s
jessie
```