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

flake.nix

@@ -1,22 +1,65 @@
 {
   inputs = {
-    #nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05";
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
-    nixpkgs-firmware.url = "github:NixOS/nixpkgs?rev=220e781eee89fa86f26d05c40a57eea1c691adec";
-    xivlauncher-rb.url = "github:dawei-nh/xivlauncher-rb-nix";
-    cheatengine.url = "github:Hy4ri/cheatengine-flake";
-    millennium.url = "github:SteamClientHomebrew/Millennium?dir=packages/nix";
-    scopebuddy.url = "github:HikariKnight/ScopeBuddy";
-    nix-gaming.url = "github:fufexan/nix-gaming";
-    nixpkgs-xr.url = "github:nix-community/nixpkgs-xr";
-    nix-cachyos-kernel.url = "github:xddxdd/nix-cachyos-kernel";
-    lazyvim.url = "github:pfassina/lazyvim-nix/v16.0.0";
-    affinity-nix.url = "github:Meo98/affinity-nix-fork";
-    nix-flatpak.url = "github:gmodena/nix-flatpak/?ref=v0.7.0";
-    appimage-manager.url = "github:kem-a/AppManager";
-    pi.url = "github:earendil-works/pi/stable";
-    gloomberb.url = "./packages/gloomberb";
+
+    xivlauncher-rb = {
+      url = "github:dawei-nh/xivlauncher-rb-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    cheatengine = {
+      url = "github:Hy4ri/cheatengine-flake";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    millennium = {
+      url = "github:SteamClientHomebrew/Millennium?dir=packages/nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    scopebuddy = {
+      url = "github:HikariKnight/ScopeBuddy";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    nix-gaming = {
+      url = "github:fufexan/nix-gaming";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    nixpkgs-xr = {
+      url = "github:nix-community/nixpkgs-xr";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    lazyvim = {
+      url = "github:pfassina/lazyvim-nix/v16.0.0";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    affinity-nix = {
+      url = "github:Meo98/affinity-nix-fork";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    nix-flatpak = {
+      url = "github:gmodena/nix-flatpak/?ref=latest";
+    };
+
+    appimage-manager = {
+      url = "github:kem-a/AppManager";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    pi = {
+      url = "github:earendil-works/pi/stable";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    gloomberb = {
+      url = "./packages/gloomberb";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
 
     home-manager = {
       url = "github:nix-community/home-manager";
@@ -24,7 +67,7 @@
     };
 
     nix-darwin = {
-      url = "github:nix-darwin/nix-darwin/nix-darwin-26.05";
+      url = "github:nix-darwin/nix-darwin";
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
@@ -39,14 +82,12 @@
       self,
       nixpkgs,
       nixpkgs-xr,
-      nixpkgs-firmware,
-      home-manager,
       nix-darwin,
       nix-flatpak,
+      home-manager,
       affinity-nix,
       affinity-thumbnailer-kde,
       millennium,
-      nix-cachyos-kernel,
       cheatengine,
       xivlauncher-rb,
       gloomberb,
@@ -65,9 +106,6 @@
       trusted-users-configuration = { nix, ... }: {
         nix.settings.trusted-users = [ "frank" ];
       };
-
-      nixos-system = "x86_64-linux";
-      nixos-pkgs = nixpkgs.legacyPackages.${nixos-system};
     in
     {
       nixosConfigurations = {
@@ -85,15 +123,6 @@
 
             ./hosts/nero/hardware.nix
             ./hosts/nero/configuration.nix
-
-            {
-              nixpkgs.overlays = [
-                (final: prev: {
-                  linux-firmware =
-                    nixpkgs-firmware.legacyPackages.${nixos-pkgs.stdenv.hostPlatform.system}.linux-firmware;
-                })
-              ];
-            }
           ];
         };