Error: attribute 'pkgs-24-11' missing, while in flake inputs

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1

Hi!

I’m trying to move my standalone home-manager file into a nixos module. This is my flake.nix:

{
  description = "Nixos config flake";

  inputs = {
    nixpkgs-unstable = {
      url = "github:nixos/nixpkgs/nixos-unstable";
    };
    nixpkgs-24-11 = {
      url = "github:nixos/nixpkgs/nixos-24.11";
    };
    nix-flatpak = {
      url = "github:gmodena/nix-flatpak/";
    };
    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs-unstable";
    };
    nix-index-db = {
      url = "github:nix-community/nix-index-database";
      inputs.nixpkgs.follows = "nixpkgs-unstable";
    };
    plasma-manager = {
      url = "github:nix-community/plasma-manager";
      inputs.nixpkgs.follows = "nixpkgs-unstable";
      inputs.home-manager.follows = "home-manager";
    };
  };

  outputs = { self, nixpkgs, nixpkgs-unstable, nixpkgs-24-11, nix-flatpak, home-manager, nix-index-db, plasma-manager, ... }@inputs:
    let
      system = "x86_64-linux";
      pkgs = "nixpkgs.legacyPackages.${system}";
      pkgs-unstable = import nixpkgs-unstable {
        inherit system;
        config.allowUnfree = true;
      };
      pkgs-24-11 = import nixpkgs-24-11 {
        inherit system;
        config.allowUnfree = true;
      };
    in
    {
      nixosConfigurations.host-1 = nixpkgs.lib.nixosSystem {
        specialArgs = {
          inherit inputs;
        };
        modules = [
          nix-flatpak.nixosModules.nix-flatpak
          home-manager.nixosModules.home-manager
          {
            home-manager = {
              useGlobalPkgs = true;
              useUserPackages = true;
              extraSpecialArgs = { inherit inputs; };
              sharedModules = [ plasma-manager.homeManagerModules.plasma-manager ];
              users = {
                jeansib = import ./home-manager/jeansib/home.nix;
              };
            };
          }
          nix-index-db.nixosModules.nix-index
          ./configuration.nix
        ];
      };
  }

But when I rebuild my system I get this error:

[root@host-1:/etc/nixos]# nixos-rebuild switch 
building the system configuration...
error:
       … while calling the 'head' builtin
         at /nix/store/32dh0g41x5w9zkqxqka3rj7h18blqhyh-source/lib/attrsets.nix:1574:11:
         1573|         || pred here (elemAt values 1) (head values) then
         1574|           head values
             |           ^
         1575|         else

       … while evaluating the attribute 'value'
         at /nix/store/32dh0g41x5w9zkqxqka3rj7h18blqhyh-source/lib/modules.nix:846:9:
          845|     in warnDeprecation opt //
          846|       { value = addErrorContext "while evaluating the option `${showOption loc}':" value;
             |         ^
          847|         inherit (res.defsFinal') highestPrio;

       … while evaluating the option `system.build.toplevel':

       … while evaluating definitions from `/nix/store/32dh0g41x5w9zkqxqka3rj7h18blqhyh-source/nixos/modules/system/activation/top-level.nix':

       … while evaluating the option `warnings':

       … while evaluating definitions from `/nix/store/32dh0g41x5w9zkqxqka3rj7h18blqhyh-source/nixos/modules/system/boot/systemd.nix':

       … while evaluating the option `systemd.services.home-manager-helenajurkowska.serviceConfig':

       … while evaluating definitions from `/nix/store/2rfas9zi1rivhpk57gmyhvmflsmnlh2m-source/nixos':

       … while evaluating the option `home-manager.users.helenajurkowska.home.file."/home/helenajurkowska/.config/fontconfig/conf.d/10-hm-fonts.conf".source':

       … while evaluating definitions from `/nix/store/2rfas9zi1rivhpk57gmyhvmflsmnlh2m-source/modules/files.nix':

       … while evaluating the option `home-manager.users.helenajurkowska.home.file."/home/helenajurkowska/.config/fontconfig/conf.d/10-hm-fonts.conf".text':

       … while evaluating definitions from `/nix/store/2rfas9zi1rivhpk57gmyhvmflsmnlh2m-source/modules/misc/xdg.nix':

       … while evaluating the option `home-manager.users.helenajurkowska.xdg.configFile."fontconfig/conf.d/10-hm-fonts.conf".text':

       … while evaluating definitions from `/nix/store/2rfas9zi1rivhpk57gmyhvmflsmnlh2m-source/modules/misc/fontconfig.nix':

       … while evaluating the option `home-manager.users.helenajurkowska.home.packages':

       … while evaluating definitions from `/nix/store/32dh0g41x5w9zkqxqka3rj7h18blqhyh-source/flake.nix':

       … while evaluating the module argument `pkgs-24-11' in ":anon-6:anon-1":

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

       error: attribute 'pkgs-24-11' missing
       at /nix/store/32dh0g41x5w9zkqxqka3rj7h18blqhyh-source/lib/modules.nix:515:28:
          514|         addErrorContext (context name)
          515|           (args.${name} or config._module.args.${name})
             |                            ^
          516|       ) (functionArgs f);

[root@host-1:/etc/nixos]#

What does it mean, that this attribute is missing? It is declared in inputs and in outputs, or maybe the problem is with hom.nix import?

2

You need to add it to specialArgs - or use the inputs.nixpkgs-24-11 that you did add.

If you want to use unfree with flake inputs you can use this, by the way, saves you the additional nixpkgs evals: GitHub - numtide/nixpkgs-unfree: nixpkgs with the unfree bits enabled

3

Thank you! That worked.