[Nix-dev] Understanding NIX_PATH

[Luca Bruno]

It's just there if someone wants to use that path.

On Sat, Jun 13, 2015 at 1:58 PM, Eike <eike at eknet.org> wrote:

>
> oh how embarrassing. I didn't see this although looking at it for sooo
> long.
>
> One thing I don't understand: what does 'nixpkgs=/etc/nixos/nixpkgs'
> mean in NIX_PATH? It doesn't exist on my system, so I gues it is
> referring to something…?
>
> thank you very much!
> Eike
>
> Luca Bruno <lethalman88 at gmail.com> writes:
>
> > I think because you are using the nixpkgs-unstable instead of
> > nixos-unstable, hence the NIX_PATH is wrong. Does /nix/var/nix/
> > profiles/per-user/root/channels/nixos/nixpkgs/nixos exist? If not, your
> > NIX_PATH is wrong.
> >
> > On Sat, Jun 13, 2015 at 12:54 PM, Eike <eike at eknet.org> wrote:
> >
> >>
> >> Hello all,
> >>
> >> I just encountered a problem that I cannot figure out myself. I switched
> >> from the 14.12 channel to the unstable channel (in NixOS) and when doing
> >> nixos-rebuild build I get the following:
> >>
> >>     # nix-channel --list
> >>     nixos https://nixos.org/channels/nixpkgs-unstable
> >>
> >>     # nixos-rebuild build
> >>     building Nix...
> >>     error: file ‘nixpkgs/nixos’ was not found in the Nix search path
> (add
> >> it using $NIX_PATH or -I)
> >>     error: file ‘nixpkgs/nixos’ was not found in the Nix search path
> (add
> >> it using $NIX_PATH or -I)
> >>     error: file ‘nixpkgs’ was not found in the Nix search path (add it
> >> using $NIX_PATH or -I)
> >>     /tmp/nixos-rebuild.lH7Hoj/nix
> >>     building the system configuration...
> >>     error: file ‘nixpkgs/nixos’ was not found in the Nix search path
> (add
> >> it using $NIX_PATH or -I)
> >>
> >> My nix env is this:
> >>
> >>     # env |grep -i ^nix
> >>     NIX_PROFILES=/run/current-system/sw /nix/var/nix/profiles/default
> >> /root/.nix-profile
> >>     NIX_CONF_DIR=/etc/nix
> >>
> >>
> NIX_PATH=/nix/var/nix/profiles/per-user/root/channels/nixos:nixpkgs=/etc/nixos/nixpkgs:nixos-config=/etc/nixos/configuration.nix
> >>     NIX_OTHER_STORES=/run/nix/remote-stores/*/nix
> >>     NIXPKGS_CONFIG=/etc/nix/nixpkgs-config.nix
> >>     NIX_USER_PROFILE_DIR=/nix/var/nix/profiles/per-user/root
> >>
> >> I can see that the 'nixpkgs=/etc/nixos/nixpkgs' part in NIX_PATH points
> >> to a non-existing thing. But it always did so and the command works in
> >> the same env if the 14.12 channel is active.
> >>
> >> I always wondered about why is nixpkgs pointing to a non-existing thing?
> >>
> >> And why is the unstable channel not building for me?
> >>
> >> Thank you and kind regards
> >> Eike
> >> _______________________________________________
> >> nix-dev mailing list
> >> nix-dev at lists.science.uu.nl
> >> http://lists.science.uu.nl/mailman/listinfo/nix-dev
> >>
>
> --
> gpg: AD7AC35E
> finger print: 137F BB0B 1639 D25F DC5D  E59C B412 C5F5 AD7A C35E
>



-- 
NixOS Linux <http://nixos.org>
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