[Nix-dev] nix-shell with system pkgs

[Colin Putney]

On Mon, Jan 25, 2016 at 3:15 PM, Yacine Hmito <yacine.hmito at gmail.com>
wrote:


> So, after this lengthy introduction, these are my questions:
>
> - Is it possible for nix-shell to use pkgs as configured by the system
> instead of evaluating '<nixpkgs>'? Would pointing toward the system's .drv
> file
> help? If so, how should I proceed?
> - If it is not possible (yet ? :P), can someone explain to me why
> myotherpkg
> can't find its dependency? This really doesn't make sense to me.
>
> Thanks to anyone who'll be kind enough to answer, and to anyone how has
> made
> this awesome OS.
>

I'm not sure I understood what you're trying to accomplish, but it sounds
like you ought to be able to just do something like this:

Have nixpkgs in your NIX_PATH point to the unstable channel. Something like


NIX_PATH=nixpkgs=$HOME/.nix-defexpr/channels/nixpkgs-unstable


Then import that in your mypkg.nix file:

let

  pkgs = import <nixpkgs> {};

  other = pkgs.callPackage ./myotherpkg.nix {};

in pkgs.stdenv.mkDerivation {...}


Finally, invoke your shell using your derivation directly:

> nix-shell mypkg.nix


Hope this helps!

-Colin
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