use unstable nixos

hosts/MaxNixosLaptop/configuration.nix

@@ -24,7 +24,10 @@
   networking.hostName = "MaxNixosLaptop"; # Define your hostname.
 
   # NIXOS
-  nix.settings.experimental-features = ["nix-command" "flakes"];
+  nix.settings = {
+    experimental-features = ["nix-command" "flakes"];
+    substituters = ["https://nix-community.cachix.org" "https://cache.nixos.org"];
+  };
 
   # Define a user account. Don't forget to set a password with ‘passwd’.
   users.users.max = {
@@ -47,16 +50,16 @@
   # $ nix search wget
   environment.systemPackages = with pkgs; [
     bambu-studio
-    unstable.neovim
+    neovim
     wget
     fprintd
     qemu
     quickemu
     home-manager
     (let
-      base = pkgs.appimageTools.defaultFhsEnvArgs;
+      base = appimageTools.defaultFhsEnvArgs;
     in
-      pkgs.buildFHSUserEnv (base
+      buildFHSUserEnv (base
         // {
           name = "fhs";
           targetPkgs = pkgs: (
@@ -92,7 +95,7 @@
   # };
   programs.ssh.startAgent = true;
   programs.nix-ld.enable = true;
-  programs.nix-ld.libraries = with pkgs; [
+  programs.nix-ld.libraries = [
   ];
 
   programs.zsh.enable = true;
@@ -116,7 +119,7 @@
         ovmf = {
           enable = true;
           packages = [
-            (pkgs.unstable.OVMF.override {
+            (pkgs.OVMF.override {
               secureBoot = true;
               tpmSupport = true;
             })