Can't install on NixOS

[Mooling0602]

Here are my config files:

/etc/nixos/configuration.nix

The same to this part

{ config, pkgs, ... }:

{
  ...
  nix.settings = {
    substituters = [ "https://ezkea.cachix.org" ];
    trusted-public-keys = [ "ezkea.cachix.org-1:ioBmUbJTZIKsHmWWXPe1FSFbeVe+afhfgqgTSNd34eI=" ];
  };
  ...
}

/etc/nixos/home.nix

{ config, pkgs, ... }:
let
  externalConfig = import ./userApps/an-anime-game-launcher.nix;
in
{
  ...
  import = externalConfig;
  ...
}

/etc/nixos/userApps/an-anime-game-launcher.nix

The same to this part

let
  aagl-gtk-on-nix = import (builtins.fetchTarball "https://github.com/ezKEa/aagl-gtk-on-nix/archive/main.tar.gz");
in
{
  home.packages = [ aagl-gtk-on-nix.an-anime-game-launcher ];
}

Error logs

~ ❯ sudo nixos-rebuild switch
building the system configuration...
error:
       … while calling the 'head' builtin

         at /nix/store/bi5zxc0v5g6ylygdwyqzh280sccg3ykb-source/lib/attrsets.nix:1575:11:

         1574|         || pred here (elemAt values 1) (head values) then
         1575|           head values
             |           ^
         1576|         else

       … while evaluating the attribute 'value'

         at /nix/store/bi5zxc0v5g6ylygdwyqzh280sccg3ykb-source/lib/modules.nix:809:9:

          808|     in warnDeprecation opt //
          809|       { value = builtins.addErrorContext "while evaluating the option `${showOption loc}':" value;
             |         ^
          810|         inherit (res.defsFinal') highestPrio;

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: in pure evaluation mode, 'fetchTarball' requires a 'sha256' argument

[Mooling0602]

I have configured home-manager installation by this article, so there's no need for me to run home-manager switch for me.

[Cryolitia]

It's a Nix question, shouldn't come up here.

---

Does sudo nixos-rebuild switch --impure work for you?

[devraza]

Another way to do this would be to add aagl-gtk-on-nix as an input in your flake.nix:

inputs.aagl-gtk-on-nix.url = "github:ezKEa/aagl-gtk-on-nix";

And reference the package in home.packages or environment.systemPackages:

home.packages = [
  inputs.aagl-gtk-on-nix.packages.${pkgs.system}.an-anime-game-launcher
];

That way, you don't need to add the --impure flag every rebuild.