chore: Update to unstable and pass stable packages down to home-manager

hosts/dregil/configuration.nix

@@ -64,14 +64,16 @@ in
 
   fonts = {
     enableDefaultPackages = true;
-    packages = with pkgs; [
-      corefonts
-      noto-fonts
-      noto-fonts-emoji
-      fira-code
-      fira-code-symbols
-      nerdfonts
-    ];
+    packages =
+      with pkgs;
+      [
+        corefonts
+        noto-fonts
+        noto-fonts-emoji
+        fira-code
+        fira-code-symbols
+      ]
+      ++ builtins.filter lib.attrsets.isDerivation (builtins.attrValues pkgs.nerd-fonts);
   };
 
   # Enable CUPS to print documents.

hosts/dregil/default.nix

@@ -3,6 +3,7 @@
   config,
   pkgs,
   inputs,
+  stable,
   ...
 }:
 {
@@ -13,6 +14,7 @@
         nixpkgs = {
           config.allowUnfree = true;
         };
+        home-manager.extraSpecialArgs = { inherit stable; };
       }
     )
     ../../modules/security.nix