fix(flake): explicitly requires flake parts input

[cameronraysmith]

Following up on ALT-F4-LLC/kickstart.nix#97 (comment), this flake contains the same issue described in ALT-F4-LLC/kickstart.nix#96 . This PR resolves the equivalent issue for https://github.com/Sironheart/nix-config .

[cameronraysmith]

The root cause resulting in failure to discover the inability to use the config elsewhere without access to the same flake-registry could be fixed by updating

nix-config/lib/shared/all-systems.nix

Lines 4 to 10 in 4f0d534

	nix = {
	extraOptions = ''
	experimental-features = nix-command flakes auto-allocate-uids
	'';
	settings.trusted-users = ["root" "steffen"];
	};

to something like

   nix = { 
     extraOptions = '' 
       experimental-features = nix-command flakes auto-allocate-uids 
     ''; 
     settings.flake-registry = builtins.toFile "null-flake-registry.json" ''{"flakes":[],"version":2}'';
     settings.trusted-users = ["root" "steffen"]; 
   }; 

Because of the general confusion and functional impurity the system flake-registry introduces, some recommend adding

nix.settings.flake-registry = builtins.toFile "null-flake-registry.json" ''{"flakes":[],"version":2}'';
to the nixos/nix-darwin/home-manager configuration of nix to avoid creating this potential for confusion.

See also ALT-F4-LLC/kickstart.nix#96 (comment) for an explanation pertaining to ALT-F4-LLC/kickstart.nix#97 (comment) where you pointed out your confusion.

[cameronraysmith]

You could similarly mirror copies of

• feat(ci): add gha workflow to update the flake lockfile ALT-F4-LLC/kickstart.nix#98
• fix(nix): default to disabled system flake registries ALT-F4-LLC/kickstart.nix#100

here if you'd like a more comprehensive solution.

[cameronraysmith]

Since this is your personal config, this was primarily to help respond to your question in ALT-F4-LLC/kickstart.nix#97 (comment). I will thus close this assuming you might like to consider making these changes yourself. Feel free to reopen if you'd prefer to review and/or merge.