uhh yes

overlays/opentrack.nix

@@ -0,0 +1,33 @@
+# ./overlays/opentrack.nix
+self: super: {
+  opentrack = super.opentrack.overrideAttrs (oldAttrs: {
+    # 1. Add dependencies for building (onnxruntime) and wrapping (makeWrapper)
+    nativeBuildInputs = oldAttrs.nativeBuildInputs or [] ++ [ super.makeWrapper ];
+    buildInputs = oldAttrs.buildInputs or [] ++ [ self.onnxruntime ];
+
+    # 2. Enable the neuralnet tracker feature during compile time
+    cmakeFlags = oldAttrs.cmakeFlags or [] ++ [ "-DSDK_NEURALNET=ON" ];
+
+    # 3. After installation, create a wrapper around the main binary
+    postInstall = (oldAttrs.postInstall or "") + ''
+      # Construct the full library path from all runtime dependencies
+      lib_path="${super.lib.makeLibraryPath [
+        super.qt5.qtbase
+        super.qt5.qtwayland
+        super.opencv
+        self.onnxruntime
+        super.procps
+        super.libevdev
+      ]}"
+
+      # Construct the full Qt plugin path
+      qt_plugin_path="${super.qt5.qtbase.bin}/lib/qt-${super.qt5.qtbase.version}/plugins:${super.qt5.qtwayland}/lib/qt-${super.qt5.qtwayland.version}/plugins"
+
+      # Use makeWrapper to prepend the environment variables to the executable
+      # This modifies the binary at $out/bin/opentrack so it ALWAYS runs with this environment
+      wrapProgram $out/bin/opentrack \
+        --prefix LD_LIBRARY_PATH : "$lib_path" \
+        --prefix QT_PLUGIN_PATH : "$qt_plugin_path"
+    '';
+  });
+}