add nix support for tryx panorama manager

flake.nix

@@ -0,0 +1,29 @@
+{
+  description = "Qt6/C++ GUI for TRYX display control on NixOS";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
+  outputs =
+    { self, nixpkgs }:
+    let
+      system = "x86_64-linux";
+      pkgs = import nixpkgs {
+        inherit system;
+      };
+    in
+    {
+      packages.${system} = rec {
+        tryx-panorama-manager = pkgs.callPackage ./package.nix { };
+        default = tryx-panorama-manager;
+      };
+
+      apps.${system}.default = {
+        type = "app";
+        program = "${self.packages.${system}.default}/bin/tryx-panorama-manager";
+      };
+
+      overlays.default = final: prev: {
+        tryx-panorama-manager = final.callPackage ./package.nix { };
+      };
+    };
+}

package.nix

@@ -0,0 +1,68 @@
+{
+  lib,
+  stdenv,
+  qt6,
+  protobuf,
+  libusb1,
+  systemd,
+  ffmpeg,
+  pkg-config,
+}:
+
+stdenv.mkDerivation {
+  pname = "tryx-panorama-manager";
+  version = lib.removeSuffix "\n" (builtins.readFile ./VERSION);
+
+  src = lib.cleanSource ./.;
+
+  nativeBuildInputs = [
+    qt6.qmake
+    qt6.qttools
+    qt6.wrapQtAppsHook
+    pkg-config
+    protobuf
+  ];
+
+  buildInputs = [
+    qt6.qtbase
+    qt6.qtdeclarative
+    protobuf
+    libusb1
+    systemd
+  ];
+
+  postPatch = ''
+    substituteInPlace tryx-panorama.pro \
+      --replace-fail '$$system(pkg-config --variable=systemduserunitdir systemd)' /usr/lib/systemd/user \
+      --replace-fail '$$system(pkg-config --variable=systemduserpresetdir systemd)' /usr/lib/systemd/user-preset
+    substituteInPlace systemd/tryx-panorama.service \
+      --replace-fail /usr/lib/tryx-panorama-manager/tryx-panorama-runtime \
+        $out/lib/tryx-panorama-manager/tryx-panorama-runtime
+  '';
+
+  qmakeFlags = [
+    "tryx-panorama-all.pro"
+    "CONFIG+=c++20"
+    "QT_TOOL.lrelease.binary=${lib.getBin qt6.qttools}/bin/lrelease"
+  ];
+
+  installFlags = [ "INSTALL_ROOT=$(out)" ];
+
+  postInstall = ''
+    cp -a $out/usr/. $out/
+    rm -r $out/usr
+  '';
+
+  qtWrapperArgs = [ "--prefix PATH : ${lib.makeBinPath [ ffmpeg ]}" ];
+  postFixup = ''
+    wrapQtApp $out/lib/tryx-panorama-manager/tryx-panorama-runtime
+  '';
+
+  meta = {
+    description = "Qt6 GUI and runtime for TRYX Panorama cooler displays";
+    homepage = "https://github.com/DXVSI/Tryx-Linux-GUI";
+    license = lib.licenses.mit;
+    platforms = [ "x86_64-linux" ];
+    mainProgram = "tryx-panorama-manager";
+  };
+}