NixOS/nixpkgs — pull request #3811 by nbp (2014-08-27 11:28:28+00:00)
Title: Options json

This add a derivation which would be used by hydra and can be used locally for improving our tools around NixOS. A tool can get the list of option as follow:

```
$ cd .../nixos
$ nix-build -A config.system.build.manual.options -o options
$ ls options/share/doc/nixos/
options.json options.xm
```