From 0e94b069eea70f3ff2ea36b8b04788a0f2ed6cb5 Mon Sep 17 00:00:00 2001
From: winston <hey@winston.sh>
Date: Fri, 6 Feb 2026 13:59:08 +0100
Subject: [PATCH 1/2] opentrack: 2026.1.0-unstable-2026-01-03 ->
 2026.1.0-unstable-2026-01-24

Also adds fusion as a dependency introduced in
opentrack/opentrack@f24a58e
---
 pkgs/by-name/op/opentrack/package.nix | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/pkgs/by-name/op/opentrack/package.nix b/pkgs/by-name/op/opentrack/package.nix
index f66c08ec2a67..4de60523bedb 100644
--- a/pkgs/by-name/op/opentrack/package.nix
+++ b/pkgs/by-name/op/opentrack/package.nix
@@ -22,13 +22,13 @@
 }:
 stdenv.mkDerivation (finalAttrs: {
   pname = "opentrack";
-  version = "2026.1.0-unstable-2026-01-03";
+  version = "2026.1.0-unstable-2026-01-24";
 
   src = fetchFromGitHub {
     owner = "opentrack";
     repo = "opentrack";
-    rev = "0779d3ce9da19d46919e909d0a1a252d67122db9";
-    hash = "sha256-n7XCNNXgfwU4q27Q7ss9tgc2Z/tmzcRxUP4chwpPN38=";
+    rev = "2d3ab7a61d2514ce51c9656908d33465a788763e";
+    hash = "sha256-+Xb3zlybQrrc1AiTdYXxDhuFNN7g7u7ryM7da2EJpaY=";
   };
 
   aruco = callPackage ./aruco.nix { };
@@ -40,6 +40,13 @@ stdenv.mkDerivation (finalAttrs: {
     meta.license = lib.licenses.free;
   };
 
+  fusion = fetchFromGitHub {
+    owner = "xioTechnologies";
+    repo = "Fusion";
+    tag = "v1.2.11";
+    hash = "sha256-9bqqP+6kfdRWIRnnP+R0lXSQs6OmZoNlbCjqiJeJjpk=";
+  };
+
   patches = [
     # calls `app.setDesktopFileName("opentrack");` - distros that don't wrap the binary apparently don't need this.
     ./desktop-filename.patch
@@ -69,6 +76,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   cmakeFlags = [
+    (lib.cmakeFeature "FETCHCONTENT_SOURCE_DIR_AHRSFUSION" "${finalAttrs.fusion}")
     (lib.cmakeFeature "OPENTRACK_COMMIT" "opentrack-${finalAttrs.version}")
     (lib.cmakeBool "SDK_WINE" withWine)
     (lib.cmakeFeature "SDK_ARUCO_LIBPATH" "${finalAttrs.aruco}/lib/libaruco.a")

From 2c2cb1f49dc1398cc145a7d2212dad2b641c1497 Mon Sep 17 00:00:00 2001
From: winston <hey@winston.sh>
Date: Fri, 6 Feb 2026 14:02:20 +0100
Subject: [PATCH 2/2] opentrack: provide v4l-utils on `PATH`

Used to open webcam camera settings:
https://github.com/opentrack/opentrack/blob/2d3ab7a61d2514ce51c9656908d33465a788763e/video-opencv/video-property-page.cpp#L150-L160
---
 pkgs/by-name/op/opentrack/package.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/by-name/op/opentrack/package.nix b/pkgs/by-name/op/opentrack/package.nix
index 4de60523bedb..57cb9562ff9a 100644
--- a/pkgs/by-name/op/opentrack/package.nix
+++ b/pkgs/by-name/op/opentrack/package.nix
@@ -18,6 +18,7 @@
   wineWow64Packages,
   onnxruntime,
   nix-update-script,
+  v4l-utils,
   withWine ? stdenv.targetPlatform.isx86_64,
 }:
 stdenv.mkDerivation (finalAttrs: {
@@ -90,7 +91,8 @@ stdenv.mkDerivation (finalAttrs: {
   # manually wrap just the main binary
   dontWrapQtApps = true;
   preFixup = ''
-    wrapQtApp $out/bin/opentrack
+    wrapQtApp $out/bin/opentrack \
+      --prefix PATH : ${lib.makeBinPath [ v4l-utils ]}
   '';
 
   desktopItems = [