Import a sub-path of a niv-managed package?

[antifuchs]

I'm stuck trying to use https://github.com/Mic92/sops-nix: The readme indicates that to use the sops module as a library, you have to add <sops-nix/modules/sops> to your imports here; but since I pinned the package to my project with niv, nix-build can't find this module.

I've made a ~minimal repo that, when checked out, fails to build in the way I describe: https://github.com/antifuchs/niv-module-import-question/blob/master/configuration.nix#L3 is the place where I try to import that sops-nix module, but am failing. Feel free to check it out and run nix-build in it. It errors with:

error: file 'sops-nix/modules/sops' was not found in the Nix search path (add it using $NIX_PATH or -I), at /Users/asf/Mess/current/sops-sobs/configuration.nix:3:15
(use '--show-trace' to show detailed location information)

Things I've tried:

• Using sources.sops-nix: that gets me the top-level definition of sops-nix, packages.

• I tried finding out how to change the nix-path to add niv-managed sources, but couldn't find out how to do that. Is that something that's supported?

Anyway, I'm stumped. Something tells me this should work, but none of the examples or bits of documentation I found have made it clear to me what I need to do to make it work.

[Mic92]

This is how you do it:

  imports = [ "${(import ./nix/sources.nix).sops-nix}/modules/sops" ];

[Mic92]

Could be added to niv documentation though as a general information on how to solve this.

[antifuchs]

Thank you! This does indeed work! :D

[nmattia]

As @Mic92 said! Yeah, good point. Let me do that right now.