Why don't inputs use their pinned nixpkgs?

[Iamvismorf]

Hi,

I have attached a repro directory below. It is basically the dendritic-unflake/npins. However, I have replaced the with-inputs.nix with the default.nix from this repo and import ./with-inputs.nix outputs with

  (import ./with-inputs.nix sources {
    nixos-stable.outPath = ./testFlake;
  })
  outputs

Now when I evaluate inputs.nixos-stable.inputs.nixpkgs in nix-repl, it does not output the nixpkgs from testFlake/flake.lock and instead the nixpkgs from sources.nixpkgs if that makes sense

nix-repl> inputs.nixos-stable.inputs.nixpkgs
{
  __functor = «lambda __functor @ /home/vsmrf/Downloads/npins/npins/default.nix:20:75»;
  _type = "flake";
  branch = "nixpkgs-unstable";
  checks = { ... };
  devShells = { ... };
  formatter = { ... };
  hash = "sha256-GMSVw35Q+294GlrTUKlx087E31z7KurReQ1YHSKp5iw=";
  htmlDocs = { ... };
  inputs = { ... };
  legacyPackages = { ... };
  lib = { ... };
  nixosModules = { ... };
  outPath = "/nix/store/jzd9vz08h5b7s3rgxzpw28mpw4rxk2ra-source";
  outputs = { ... };
  repository = { ... };
  revision = "01fbdeef22b76df85ea168fbfe1bfd9e63681b30";
  sourceInfo = { ... };
  submodules = false;
  type = "Git";
  url = "https://github.com/nixos/nixpkgs/archive/01fbdeef22b76df85ea168fbfe1bfd9e63681b30.tar.gz";
}

nix-repl> inputs.nixpkgs
{
  __functor = «lambda __functor @ /home/vsmrf/Downloads/npins/npins/default.nix:20:75»;
  _type = "flake";
  branch = "nixpkgs-unstable";
  checks = { ... };
  devShells = { ... };
  formatter = { ... };
  hash = "sha256-GMSVw35Q+294GlrTUKlx087E31z7KurReQ1YHSKp5iw=";
  htmlDocs = { ... };
  inputs = { ... };
  legacyPackages = { ... };
  lib = { ... };
  nixosModules = { ... };
  outPath = "/nix/store/jzd9vz08h5b7s3rgxzpw28mpw4rxk2ra-source";
  outputs = { ... };
  repository = { ... };
  revision = "01fbdeef22b76df85ea168fbfe1bfd9e63681b30";
  sourceInfo = { ... };
  submodules = false;
  type = "Git";
  url = "https://github.com/nixos/nixpkgs/archive/01fbdeef22b76df85ea168fbfe1bfd9e63681b30.tar.gz";
}

So, is this something that I don't understand or is it a bug?
npins.zip

[Iamvismorf]

I also noticed most of the inputs are empty attrset

[Iamvismorf]

@vic hey, any comments on this issue 😅? Even on lastest vesrion of with-inputs I notice the same behaviour

[vic]

Hey, :)

I'm sorry, I had not looked at this issue. I have not downloaded your zip, but I will try to help without opening that zip:

Why don't inputs use their pinned nixpkgs?

with-inputs does auto follow on all inputs, this is because most of the sources it supports are just a flattened list of inputs (like npins).

So, a subflake.nixpkgs is being automatically following the root nixpkgs. Unless you also specify subflake.nixpkgs.follows = "another-nixpkgs" to make it different.

[Iamvismorf]

with-inputs does auto follow on all inputs

Ah, I see. But what about inputs of inputs being empty attrset? When you get the chance, after downloading the zip please do the following:

  npins add github hyprwm hyprland
  nix repl --file ./default.nix
  inputs.hyprland.inputs.

All inputs except nixpkgs are empty.