dregil: Update home-manager config

hosts/dregil/configuration.nix

@@ -71,6 +71,7 @@ in
   fonts = {
     enableDefaultFonts = true;
     fonts = with pkgs; [
+        corefonts
         noto-fonts
         noto-fonts-emoji
         fira-code
@@ -110,7 +111,8 @@ in
       uhk-agent
       
       # gaming support
-      bottles
+      lutris
+      #inputs.simplex-chat.packages."x86_64-linux"."exe:simplex-chat"
     ];
   };
 
@@ -123,6 +125,12 @@ in
      nvidia-offload
   ];
 
+  # adjust channels to nixpkgs used on this system via this flake
+  environment.etc."nix/inputs/nixpkgs".source = inputs.nixpkgs-unstable.outPath;
+  nix.nixPath = [
+    "nixpkgs=${inputs.nixpkgs-unstable}"
+  ];
+
   # Some programs need SUID wrappers, can be configured further or are
   # started in user sessions.
   # programs.mtr.enable = true;