Nix : Use different way to include applefont.

.config/linux/system/derivation/applefont/flake.nix

@@ -1,15 +1,10 @@
 {
 	description = "Apple fonts.";
 
-	inputs = {
-		nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
-	};
-
-	outputs = { self, nixpkgs } @inputs:
+	outputs = { nixpkgs, system } @inputs:
 		let
-			system = "x86_64-linux";
-			pkgs   = nixpkgs.legacyPackages.${system};
-			lib    = nixpkgs.lib;
+			pkgs = nixpkgs.legacyPackages.${system};
+			lib  = nixpkgs.lib;
 		in {
 			packages.${system}.default = pkgs.stdenv.mkDerivation rec {
 				pname   = "applefonts";

.config/linux/system/flake.nix

@@ -6,7 +6,6 @@
 			url   = "git+https://git.voronind.com/voronind/linux.git";
 			flake = false;
 		};
-		applefonts.url = "git+file:.?dir=./.config/linux/system/derivation/apple_font";
 
 		# Nvim plugins.
 		nvimAlign = {
@@ -87,7 +86,7 @@
 		};
 	};
 
-	outputs = { self, nixpkgs, dotfiles, applefonts, ... } @inputs: rec {
+	outputs = { self, nixpkgs, dotfiles, ... } @inputs: rec {
 		# Constant values.
 		nixosModules.const = {
 			hashedPassword = "$y$j9T$oqCB16i5E2t1t/HAWaFd5.$tTaHtAcifXaDVpTcRv.yH2/eWKxKE9xM8KcqXHfHrD7"; # Use `mkpasswd`.
@@ -121,6 +120,14 @@
 			./module/common/Wallpaper.nix
 		];
 
+		# Apple fonts flake.
+		# applefont-flake = import ./derivation/applefont/flake.nix;
+		# applefont-outputs = applefont-flake.outputs {
+		# 	inherit nixpkgs;
+		# 	inherit system;
+		# };
+		# applefont = applefont-outputs.packages.system.default;
+
 		# Function to create a host.
 		mkHost = { system, hostname, modules }: nixpkgs.lib.nixosSystem {
 			inherit system;
@@ -132,9 +139,13 @@
 				inputs.self.nixosModules.common
 			] ++ modules;
 
-			specialArgs.const  = self.nixosModules.const;
-			specialArgs.flake  = self;
-			specialArgs.inputs = inputs;
+			specialArgs.const     = self.nixosModules.const;
+			specialArgs.flake     = self;
+			specialArgs.inputs    = inputs;
+			specialArgs.applefont = ((import ./derivation/applefont/flake.nix).outputs {
+				inherit nixpkgs;
+				inherit system;
+			}).packages.${system}.default;
 		};
 
 		# List of all hosts bellow.

.config/linux/system/module/common/Font.nix

@@ -1,6 +1,6 @@
-{ pkgs, inputs, ... }: {
+{ pkgs, specialArgs, ... }: rec {
 	fonts.packages = with pkgs; [
-		inputs.applefonts.packages.${pkgs.system}.default
+		specialArgs.applefont
 		(nerdfonts.override { fonts = [ "Terminus" ]; })
 	];
 }