NixOS/nixpkgs — pull request #2837 by lethalman (2014-06-05 16:45:33+00:00)
Title: Add system.securityUpdates to quick replace system dependencies

Example usage for the current openssl bug:
```
system.securityUpdates = with pkgs; [
({ old = openssl;
new = callPackage /path/to/new/openssl {
fetchurl = fetchurlBoot;
cryptodevHeaders = linuxPackages.cryptodev.override {
fetchurl = fetchurlBoot;
onlyHeaders = true;
};
};
})
];
```

I only did nixos-rebuild build because I've a little of fear :P is what I did safe?