Cool, might have to do some experimenting.

--
  John Ramsden


On Fri, Jul 7, 2017, at 08:35 PM, Danylo Hlynskyi wrote:
> I've seen this in a wild
> 
>  system.autoUpgrade.enable = true;
> system.autoUpgrade.flags = lib.mkForce
>   [ "--no-build-output"
>     "-I" "nixpkgs=/etc/nixos/nixpkgs-channels"
>   ];
> systemd.services.nixos-upgrade.path = [ pkgs.git ];
> systemd.services.nixos-upgrade.preStart = ''
>   cd /etc/nixos/nixpkgs-channels
>   ${pkgs.git}/bin/git pull
> '';
> 
> 
> 
> https://github.com/garbas/dotfiles/blob/a76e12166efa57edded8c381074104fefe5c7da6/nixos/floki.nix#L27-L36>
>  
> 2017-07-07 9:36 GMT+03:00 John Ramsden via nix-dev 
> <nix-dev@lists.science.uu.nl>:>> Thanks that's helpful. In other words if I'm 
> using a checked out git>>  repository I'm no longer able to use 
> 'system.autoUpgrade'.
>> 
>>  --
>>    John Ramsden
>> 
>> On Thu, Jul 6, 2017, at 10:56 PM, Vladimír Čunát wrote:
>>  > On 07/07/2017 01:46 AM, John Ramsden via nix-dev wrote:
>>  > > I was also wondering what exactly the 'nixos-rebuild switch' 
>> command's>>  > > '--upgrade' flag does.
>>  >
>>  > It does
>>  > $ nix-channel --update nixos
>>  > Best see the source if you want details, as it's relatively simple:>>  > 
>> https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/installer/tools/nixos-rebuild.sh#L197>>
>>   >
>>  > --Vladimir
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