modules: system: nix: add inputs to NIX_PATH

modules/system/nix/default.nix

@@ -1,5 +1,5 @@
 # Nix related settings
-{ config, inputs, lib, pkgs, ... }:
+{ config, inputs, lib, options, pkgs, ... }:
 let
   cfg = config.my.system.nix;
 in
@@ -8,6 +8,8 @@ in
     enable = my.mkDisableOption "nix configuration";
 
     addToRegistry = my.mkDisableOption "add inputs and self to registry";
+
+    addToNixPath = my.mkDisableOption "add inputs and self to nix path";
   };
 
   config = lib.mkIf cfg.enable (lib.mkMerge [
@@ -31,5 +33,13 @@ in
         nur.flake = inputs.nur;
       };
     })
+
+    (lib.mkIf cfg.addToNixPath {
+      nix.nixPath = options.nix.nixPath.default ++ [
+        "self=${inputs.self}"
+        "pkgs=${inputs.nixpkgs}"
+        "nur=${inputs.nur}"
+      ];
+    })
   ]);
 }