nix-env not heeding NIX_PATH

[fare]

I have my own fork of nixpkgs to work on a few packages. So, I use:

export NIX_PATH=nixpkgs=${srcdir}/nixpkgs:nixos-config=/etc/nixos/configuration.nix 

I have no problem rebuilding from that using: nixos-rebuild switch

Now, I'm trying to use nix-env -qaP to get a list of available packages with their version, but instead of using my NIX_PATH, it uses the channels from ~/.nix-channels, which is the wrong thing, and that, even if I use nix-env -I $NIX_PATH -qaP.

I tried to put file://${srcdir}/nixpkgs nixos in my ~/.nix-channels, but it wants a MANIFEST file that is not present and that I don't know how to generate.

Using nix-env (Nix) 1.11.11 (I don't know how to get a version for nixos-rebuild).

[domenkozar]

This is fixed in the new interface: https://github.com/NixOS/nix/issues/993

[veprbl]

Maybe this will work for you:

nix-env -f ${srcdir}/nixpkgs -qaP

[domenkozar]

IIRC you can just do nix-env -qaP -f '<nixpkgs>'

[fare]

Yes, that works! Thanks a lot.