refactor: fully rebase to nixpkgs-unstable rather than fixed release with backports

home/frank.nix

@@ -1,7 +1,4 @@
 { inputs, pkgs, ... }:
-let
-  unstable = inputs.nixpkgs-unstable.legacyPackages.${pkgs.stdenv.hostPlatform.system};
-in
 {
   imports = [
     inputs.lazyvim.homeManagerModules.default
@@ -27,7 +24,7 @@ in
   };
 
   xdg =
-    if pkgs.stdenv.isDarwin then
+    if pkgs.stdenv.hostPlatform.isDarwin then
       { }
     else
       {
@@ -100,8 +97,6 @@ in
     fastfetch = {
       enable = true;
 
-      package = unstable.fastfetch;
-
       settings = {
         modules = [
           "title"