[Nix-dev] cleaning up old configurations

[zimbatm]

Yes this one is quite confusing. The grub list is generated on activation
of a new profile. Try re-running `nixos-rebuild switch`. It might work to
just run /run/current-system/activate



On Mon, 21 Nov 2016 at 09:11 Henning Thielemann <
lemming at henning-thielemann.de> wrote:

>
> Another beginners question ...
>
> I am confused: The NixOS boot menu shows a list of 17 configurations. I
> want to remove some of them in order to free some space on the NixOS
> partition. I try
>
> $ sudo nix-env --list-generations
>    12   2015-08-30 11:20:39
>    19   2015-12-22 11:50:11
>    20   2016-07-15 15:52:44
>    21   2016-11-20 13:09:56
>    22   2016-11-20 13:10:06   (current)
>
> in order to obtain the numbers for --delete-generations. However, it seems
> that the listed "generations" are something different from the
> "configurations" in the boot menu. How can I list and delete some of those
> configurations from the boot menu?
>
>
> Btw. I think after upgrading NixOS it is a natural desire to get rid of
> some old versions. What about adding a pointer to
>    http://nixos.org/nixos/manual/index.html#sec-upgrading
> ?
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