alacritty: fix path to xdg-open

pkgs/applications/misc/alacritty/default.nix

@@ -22,6 +22,7 @@
   libxcb,
   libxkbcommon,
   wayland,
+  xdg_utils,
 
   # Darwin Frameworks
   AppKit,
@@ -75,6 +76,10 @@ in buildRustPackage rec {
     ++ lib.optionals stdenv.isDarwin [ AppKit CoreGraphics CoreServices CoreText Foundation OpenGL ];
 
   outputs = [ "out" "terminfo" ];
+  postPatch = ''
+    substituteInPlace alacritty_terminal/src/config/mouse.rs \
+      --replace xdg-open ${xdg_utils}/bin/xdg-open
+  '';
 
   postBuild = lib.optionalString stdenv.isDarwin "make app";