diff --git a/default.nix b/default.nix
index f7d49e7..a6117bc 100644
--- a/default.nix
+++ b/default.nix
@@ -1,4 +1,4 @@
-{ inputs, ... }@moduleArgs:
+{ inputs, ... }:
 
 # ============================================================================
 # USDA Dashboard External System Module
@@ -11,6 +11,7 @@
 #       "usda-dash" = builtins.fetchGit {
 #         url = "https://git.factory.uga.edu/MODEL/usda-dash-config.git";
 #         rev = "commit-hash";
+#         submodules = true;  # REQUIRED for usda-vision submodule
 #       };
 #     };
 #   };
@@ -23,17 +24,15 @@
 }:
 
 let
-  # Get the directory where this module is located
-  moduleDir = builtins.toString (builtins.dirOf moduleArgs);
-  
   # Create a derivation that packages the usda-vision directory
   usda-vision-app = pkgs.stdenv.mkDerivation {
     pname = "usda-vision";
     version = "1.0.0";
     
     # Use the directory from this repository with explicit source filtering
+    # The ./usda-vision path is relative to this module file
     src = lib.cleanSourceWith {
-      src = "${moduleDir}/usda-vision";
+      src = ./usda-vision;
       filter = path: type:
         let
           baseName = baseNameOf path;