trying to add option to nvim module

flake.lock

@@ -185,11 +185,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1740162094,
+        "lastModified": 1740170230,
-        "narHash": "sha256-QpD9XNR6tPPsYTavZw1o99Tcn3ILrp1SXr669Ru6vuY=",
+        "narHash": "sha256-Clnn2Y+bx4LI2caUqtCxaYKKRLC4ifXVSgVZKJIskFA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "5525603a0c65072af1cd24cd2750fa33749e4943",
+        "rev": "f1c5d6d23fd57011b78cb2424f5c73e68c9e8879",
         "type": "github"
       },
       "original": {
@@ -214,11 +214,28 @@
         "type": "github"
       }
     },
+    "plugin-gruvbox": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1738710709,
+        "narHash": "sha256-BBMDCIhwTvZQyeWug8zzUwV8uuqQIkpXtEpoErvAKFc=",
+        "owner": "ellisonleao",
+        "repo": "gruvbox.nvim",
+        "rev": "089b60e92aa0a1c6fa76ff527837cd35b6f5ac81",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ellisonleao",
+        "repo": "gruvbox.nvim",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "neovim": "neovim",
         "nixpkgs": "nixpkgs",
-        "plugin-dracula": "plugin-dracula"
+        "plugin-dracula": "plugin-dracula",
+        "plugin-gruvbox": "plugin-gruvbox"
       }
     },
     "treefmt-nix": {

flake.nix

@@ -13,30 +13,13 @@
     	url = "github:Mofiqul/dracula.nvim";
     	flake = false;
     };
+    plugin-gruvbox = {
+        url = "github:ellisonleao/gruvbox.nvim";
+	flake = false;
+    };
   };
   outputs = { self, nixpkgs, neovim, ... }@inputs: {
-	nixosModules.neovim = { config, pkgs, ...}: {      
+	neovim = import ./modules/nvim.nix;
-		# Installation de Neovim en tant que package système
-		environment.systemPackages = [ neovim.packages.${pkgs.system}.neovim ];
-		
-
-
-      # Activer nvim
-      programs.neovim = {
-      	enable = true;
-	
-	        # Native way to configure Neovim
-        configure = {
-          customRC = ''
-            " Add Dracula to runtimepath
-            set runtimepath+=${inputs.plugin-dracula}
-            
-            " Enable Dracula colorscheme
-            colorscheme dracula
-          '';
-        };
 
 	};
-    };
-    };
 }

modules/nvim/theme.nix

@@ -0,0 +1,32 @@
+{ config, pkgs, lib, inputs, ... }:
+with lib; {
+  options.programs.neovim.theme = mkOption {
+    type = types.enum [ "dracula" "gruvbox" "tokyonight" ];
+    default = "dracula";
+    description = "Choose the Neovim theme.";
+  };
+
+  config = let
+    themePackage = {
+      "dracula" = inputs.plugin-dracula;
+      "gruvbox" = inputs.plugin-gruvbox;
+      "tokyonight" = null; # No flake input, assumes user manages it manually
+    }.${config.programs.neovim.theme} or null;
+  in {
+    environment.systemPackages = [ inputs.neovim.packages.${pkgs.system}.neovim ];
+
+    programs.neovim = {
+      enable = true;
+      configure = {
+          customRC = ''
+            " Add Dracula to runtimepath
+            set runtimepath+=${config.programs.neovim.theme}
+            
+            " Enable Dracula colorscheme
+            colorscheme dracula
+          '';
+        };
+      };
+  };
+}
+