Fix nix run .#clan-app

pkgs/webview-lib/default.nix

@@ -0,0 +1,34 @@
+{ pkgs, ... }:
+
+pkgs.stdenv.mkDerivation {
+  pname = "webview";
+  version = "nigthly";
+
+  src = pkgs.fetchFromGitHub {
+    owner = "webview";
+    repo = "webview";
+    rev = "83a4b4a5bbcb4b0ba2ca3ee226c2da1414719106";
+    sha256 = "sha256-5R8kllvP2EBuDANIl07fxv/EcbPpYgeav8Wfz7Kt13c=";
+  };
+
+  outputs = [
+    "out"
+    "dev"
+  ];
+
+  # Dependencies used during the build process, if any
+  buildInputs = with pkgs; [
+    gnumake
+    cmake
+    pkg-config
+    webkitgtk_6_0
+    gtk4
+  ];
+
+  meta = with pkgs.lib; {
+    description = "Tiny cross-platform webview library for C/C++. Uses WebKit (GTK/Cocoa) and Edge WebView2 (Windows)";
+    homepage = "https://github.com/webview/webview";
+    license = licenses.mit;
+    platforms = platforms.linux ++ platforms.darwin;
+  };
+}