Bjørn Forsman aff4394be6 nixos-generate-config: fix nix-env example command
An escape char is needed to prevent "$ nix" from being evaluated and
expanded to an empty string. With this change the resulting text is

  $ nix-env -qaP | grep wget

instead of

  -env -qaP | grep wget
2014-06-12 21:18:21 +02:00
..
2013-10-28 22:45:58 +01:00
2014-05-27 22:56:36 +02:00

*** NixOS ***

NixOS is a Linux distribution based on the purely functional package
management system Nix.  More information can be found at
http://nixos.org/nixos and in the manual in doc/manual.