fix build step:

default.nix

@@ -31,13 +31,25 @@ let
     # Use the directory from this repository
     src = ./usda-vision;
     
-    nativeBuildInputs = [ pkgs.makeWrapper ];
+    nativeBuildInputs = [ pkgs.makeWrapper pkgs.rsync ];
+    
+    # Don't run these phases, we'll do everything in installPhase
+    dontBuild = true;
+    dontConfigure = true;
     
     installPhase = ''
       mkdir -p $out/opt/usda-vision
       
-      # Copy all application files
-      cp -r $src/. $out/opt/usda-vision/
+      # Debug: show what's in source
+      echo "Source directory contents:"
+      ls -la $src/ || true
+      
+      # Copy all application files using rsync to preserve everything
+      ${pkgs.rsync}/bin/rsync -av --exclude='.git' $src/ $out/opt/usda-vision/
+      
+      # Verify files were copied
+      echo "Destination directory contents:"
+      ls -la $out/opt/usda-vision/ || true
       
       # Remove any existing .env files
       rm -f $out/opt/usda-vision/management-dashboard-web-app/.env