Try adding kutu wm

flake.lock

@@ -21,6 +21,24 @@
         "type": "github"
       }
     },
+    "kutu": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1783423484,
+        "narHash": "sha256-JzhhYBNoshT6TCutDsSyDRMHi0HEyTKO5H7pUu2KOFA=",
+        "ref": "refs/heads/main",
+        "rev": "248e5a2c05eb1e79ef0b720a018cec9852a60706",
+        "revCount": 31,
+        "type": "git",
+        "url": "https://git.syedm.dev/syedm/kutu.rb.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.syedm.dev/syedm/kutu.rb.git"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1783148766,
@@ -37,10 +55,27 @@
         "type": "github"
       }
     },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1783148766,
+        "narHash": "sha256-uslt2pqShTIXDdAHRHv2QkYLsVdY8Oqwz0EA48/RSM8=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "a50de1b7d8a586adc18d2395c19de7d6058e6030",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-26.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "home-manager": "home-manager",
-        "nixpkgs": "nixpkgs"
+        "kutu": "kutu",
+        "nixpkgs": "nixpkgs_2"
       }
     }
   },

flake.nix

@@ -1,7 +1,7 @@
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05";
-    kutu.url = "git+https://git.syedm.dev/syedm/kutu.git";
+    kutu.url = "git+https://git.syedm.dev/syedm/kutu.rb.git";
 
     home-manager = {
       url = "github:nix-community/home-manager/release-26.05";
@@ -9,13 +9,14 @@
     };
   };
 
-  outputs = { nixpkgs, home-manager, ... }:
+  outputs = { nixpkgs, kutu, home-manager, ... }:
   let
     system = "x86_64-linux";
   in {
     nixosConfigurations = {
       syedm = nixpkgs.lib.nixosSystem {
         inherit system;
+        specialArgs = { inherit inputs; };
         modules = [
           ./hosts/common.nix
           ./hosts/syedm
@@ -26,6 +27,7 @@
 
       tardis = nixpkgs.lib.nixosSystem {
         inherit system;
+        specialArgs = { inherit inputs; };
         modules = [
           ./hosts/common.nix
           ./hosts/tardis

hosts/tardis/default.nix

@@ -1,4 +1,4 @@
-{ config, lib, pkgs, ... }:
+{ config, lib, pkgs, inputs, ... }:
 
 {
   imports =
@@ -14,6 +14,8 @@
     firefox
     kitty
     rofi
+
+    inputs.kutu.packages.${pkgs.system}.default
   ]);
 
   services.xserver = {