add looking-glass package with client formulae

.gitignore

@@ -1,8 +1,8 @@
 # ---> Nix
 # Ignore build outputs from performing a nix-build or `nix build` command
-result
+**/result
-result-*
+**/result-*
 
 # Ignore automatically generated direnv output
-.direnv
+**/.direnv
 

looking-glass/client.nix

@@ -0,0 +1,59 @@
+{
+  stdenv,
+  fetchFromGitHub,
+  cmake,
+  pkg-config,
+  wayland-scanner,
+  fontconfig,
+  expat,
+  wayland,
+  libxkbcommon,
+  libGL,
+  pipewire,
+  libsamplerate,
+  spice-protocol,
+  nettle,
+  libffi,
+  libx11,
+}:
+
+stdenv.mkDerivation {
+  pname = "looking-glass";
+  version = "4bb2c58fb6d0df9e863ad45924dd4decc7e9cf4e";
+
+  src = fetchFromGitHub {
+    owner = "gnif";
+    repo = "LookingGlass";
+    rev = "4bb2c58fb6d0df9e863ad45924dd4decc7e9cf4e";
+    hash = "sha256-Dc0sFnJVM0xJ0FfIQqGQKxFUj6mhp3qgB772h3Dgowc";
+    fetchSubmodules = true;
+    leaveDotGit = false;
+  };
+
+
+  nativeBuildInputs = [ cmake pkg-config wayland-scanner ];
+  buildInputs = [
+    fontconfig
+    expat
+    wayland
+    libxkbcommon
+    libGL
+    pipewire
+    libsamplerate
+    spice-protocol
+    nettle
+    libffi
+    libx11
+  ];
+
+  cmakeDir = "../client";
+
+  cmakeFlags = [
+    "-DENABLE_BACKTRACE=no"
+    "-DENABLE_WAYLAND=yes"
+    "-DENABLE_PIPEWIRE=yes"
+    "-DENABLE_PULSEAUDIO=no"
+    "-DENABLE_X11=no"
+    "-DOPTIMIZE_FOR_NATIVE=x86-64-v3"
+  ];
+}

looking-glass/default.nix

@@ -0,0 +1,7 @@
+let
+  nixpkgs = fetchTarball "https://github.com/NixOS/nixpkgs/tarball/nixos-26.05";
+  pkgs = import nixpkgs { config = {}; overlays = []; };
+in
+{
+  client = pkgs.callPackage ./client.nix { };
+}