diff --git a/default.nix b/default.nix
index 4e5e686..3449aaa 100644
--- a/default.nix
+++ b/default.nix
@@ -35,7 +35,10 @@ let
     pname = "mindvision-camera-sdk";
     version = "2.1.0.49";
     
-    src = ./usda-vision/camera-management-api/camera_sdk + "/linuxSDK_V2.1.0.49(250108).tar.gz";
+    # Reference the tar.gz file from the camera_sdk directory
+    src = pkgs.runCommand "camera-sdk-source" {} ''
+      cp ${./usda-vision/camera-management-api/camera_sdk}/"linuxSDK_V2.1.0.49(250108).tar.gz" $out
+    '';
     
     nativeBuildInputs = [ pkgs.makeWrapper ];
     buildInputs = [ pkgs.libusb1 ];