uhh yes

flake.nix

@@ -15,11 +15,14 @@
       system = "x86_64-linux";
       username = "xory";
 
+      opentrack-overlay = import ./overlays/opentrack.nix;
+
       mkNixosHost = hostName:
         nixpkgs.lib.nixosSystem {
 	        inherit system;
           specialArgs = { inherit inputs; };
 	        modules = [
+            { nixpkgs.overlays = [ opentrack-overlay ]; }
             impermanence.nixosModules.impermanence
             ./hosts/${hostName}/configuration.nix
 	          ./hosts/${hostName}/hardware-configuration.nix

hosts/nullstar/configuration.nix

@@ -122,6 +122,8 @@
     variant = "";
   };
 
+  services.flatpak.enable = true;
+
   # Enable CUPS to print documents.
   # services.printing.enable = true;
   

hosts/nullstar/home.nix

@@ -42,6 +42,10 @@
     input-leap
     viber
     hyprpolkitagent
+    pulsemixer
+    feh
+    opentrack
+    aitrack
   ];
 
   home.file = {

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"
+    '';
+  });
+}