use COSMIC unstable flake

desktops/cosmic.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }: 
+{ config, pkgs, ... }:
 
 {
   # COSMIC
@@ -7,4 +7,8 @@
     desktopManager.cosmic.enable = true;
   };
 
+  # Add community COSMIC packages
+  environment.systemPackages = (with pkgs; [
+    cosmic-ext-tweaks
+  ]);
 }

flake.nix

@@ -3,16 +3,17 @@
 
    inputs = {
       nixpkgs.url = "github:NixOS/nixpkgs/release-25.05";
-      nixpkgs-ahoneybun.url = "gitlab:ahoneybun/nixpkgs/main";
       home-manager = {
          url = "github:nix-community/home-manager/release-25.05";
          inputs.nixpkgs.follows = "nixpkgs";
       };
       nixos-hardware.url = "github:NixOS/nixos-hardware/master";
-      pinix.url = "github:remi-dupre/pinix";
+      helix.url = "github:helix-editor/helix/refs/tags/25.07.1";
+      cosmic-unstable.url = "github:ninelore/nixpkgs-cosmic-unstable/main";
+      nixpkgs-ahoneybun.url = "gitlab:ahoneybun/nixpkgs/main";
    };
 
-   outputs = inputs@{ self, nixpkgs, nixpkgs-ahoneybun, home-manager, nixos-hardware, pinix }: {
+   outputs = inputs@{ self, nixpkgs, home-manager, nixos-hardware, helix, cosmic-unstable, nixpkgs-ahoneybun, ... }: {
       nixosConfigurations = {
          "nixos" = nixpkgs.lib.nixosSystem {
             system = "x86_64-linux";
@@ -63,7 +64,8 @@
             specialArgs = { inherit inputs; };
             modules = [
                ./garrus.nix
-               ./gnome.nix
+               #./gnome.nix
+               ./cosmic.nix
                ./configuration.nix
                nixos-hardware.nixosModules.system76
                home-manager.nixosModules.home-manager
@@ -115,7 +117,7 @@
                ./hardware-configuration.nix
             ];
          };
-         
+
       };
    };
 }