install-iso has a configuration conflict by default

[Kreyren]

$ nix build .#nixosConfigurations.installer-gnome.config.formats.install-iso
warning: Git tree '/home/kreyren/src/nixium' is dirty
error:
       … while calling the 'derivationStrict' builtin

         at /builtin/derivation.nix:9:12: (source not available)

       … while evaluating derivation 'nixos-23.11.20240220.526d051-x86_64-linux.iso.iso'
         whose name attribute is located at /nix/store/bjjfp9f2342bim734yyy498gvwxi301i-source/pkgs/stdenv/generic/make-derivation.nix:348:7

       … while evaluating attribute 'buildCommand' of derivation 'nixos-23.11.20240220.526d051-x86_64-linux.iso.iso'

         at /nix/store/bjjfp9f2342bim734yyy498gvwxi301i-source/pkgs/build-support/trivial-builders/default.nix:87:14:

           86|       enableParallelBuilding = true;
           87|       inherit buildCommand name;
             |              ^
           88|       passAsFile = [ "buildCommand" ]

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

       error:
       Failed assertions:
       - You can not use networking.networkmanager with networking.wireless.
       Except if you mark some interfaces as <literal>unmanaged</literal> by NetworkManager.

To reproduce declare a minimal nixosConfiguration and try to build it with install-iso, for reference this is a flake-parts-style config:

{ self, inputs, config, ... }:

# Build Installer ISO

{
	flake.nixosConfigurations."installer" = inputs.nixpkgs.lib.nixosSystem {
			system = "x86_64-linux";
			pkgs = import inputs.nixpkgs {
				system = "x86_64-linux";
				config.allowUnfree = true;
			};

			modules = [
				self.inputs.nixos-generators.nixosModules.all-formats
			];
		};
}

[Kreyren]

pebcak - i am testing "installer" while trying to build "installer-gnome"

[ParetoOptimalDev]

Either pebkac again or there is some issue here. Not sure, searching my config codebase for network.wireless again... iso seems to build fine but not iso-installer.

[ParetoOptimalDev]

I believe the issue might be because of this:

nixos-generators/formats/install-iso.nix

Line 12 in d942db8

systemd.services.wpa_supplicant.wantedBy = lib.mkForce ["multi-user.target"];

So for the case of the installer-iso format you need to not enable networking.networkmanager it seems like.

Or perhaps because nixos-install exists on the iso format it's meant to be this way? Not sure.

[ParetoOptimalDev]

also, relates to #281