[Nix-dev] upgrades and channels

[Sergey Mironov]

Hi. Please, also take a look also on the topic "nix-env ignores
NIX_PATH" - it contains some answers on NIX_PATH theme.

+1 for nix-env/nixos-rebuild -I unification. I think their cmdline
interface is too complicated.

2012/7/6 Mathijs Kwik <mathijs at bluescreen303.nl>:
> On Thu, Jul 5, 2012 at 11:07 PM, Eelco Dolstra
> <eelco.dolstra at logicblox.com> wrote:
>> Hi,
>>
>> On 05/07/12 17:02, Mathijs Kwik wrote:
>>
>>>> And a question about NIX_PATH:
>>>> by default it's
>>>>
>>> NIX_PATH='/nix/var/nix/profiles/per-user/root/channels/nixos:nixpkgs=/etc/nixos/nixpkgs:nixos=/etc/nixos/nixos:nixos-config=/etc/nixos/configuration.nix:services=/etc/nixos/services'
>>>>
>>>> I understand the name=value pairs give the <name> syntax, but how does a plain
>>> dirname (like the channels/nixos dir) get handled?
>>
>> See the description of NIX_PATH in nix-env(1).
>
> Nice, I should read the man pages more :)
>
>>
>>>> I see it contains nixos and nixpkgs, but also a cryptic default.nix
>>
>> The default.nix just includes Nixpkgs so that nix-env can find the Nixpkgs copy
>> in the NixOS channel.
>>
>>>> My local /home/mathijs/nix-dev dir contains nixos and nixpkgs.
>>>> If I want to switch to using those instead of the channel (temporarily), can I
>>> just point NIX_PATH there?
>>
>> Yes, or use -I (e.g. "nixos-rebuild switch -I ~mathijs/nix-dev").
>
> This works for nixos-rebuild, but not for nix-env.
>
> Now, I know I can fiddle with the synlinks below ~/.nix-defexpr, but I
> would prefer not to.
> Say I can normally upgrade a package by
> nix-env -iA nixos.pkgs.xterm
>
> Now I want to do this again, but now using my local ~/nix-dev.
>
> I tried
> nix-env -iA nixos.pkgs.xterm -I ~/nix-dev
> nix-env -iA nixos.pkgs.xterm -f ~/nix-dev
>
> NIX_PATH="~/nix-dev" nix-env -iA nixos.pkgs.xterm
> NIX_PATH="nixpkgs=~/nix-dev/nixpkgs:nixos=~/nix-dev/nixos" nix-env -iA
> nixos.pkgs.xterm
>
> none of these worked.
>
>
>>
>> --
>> Eelco Dolstra | LogicBlox, Inc. | http://nixos.org/~eelco/
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