bustle: use gettext from nixpkgs

The vendored gettext fails to build with clang 16 on Darwin. The gettext in nixpkgs works.

pkgs/by-name/bu/bustle/package.nix

@@ -1,6 +1,7 @@
 { lib
 , stdenv
 , fetchFromGitLab
+, buildPackages
 , cargo
 , meson
 , ninja
@@ -9,9 +10,12 @@
 , rustPlatform
 , rustc
 , wrapGAppsHook4
+, darwin
+, gettext
 , glib
 , gtk4
 , libadwaita
+, libiconv
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -32,6 +36,14 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-r29Z+6P+yuCpOBUE3vkESd15lcGXs5+ZTBiQ9nW6DJ4=";
   };
 
+  env = lib.optionalAttrs stdenv.isDarwin {
+    # Set the location to gettext to ensure the nixpkgs one on Darwin instead of the vendored one.
+    # The vendored gettext does not build with clang 16.
+    GETTEXT_BIN_DIR = "${lib.getBin buildPackages.gettext}/bin";
+    GETTEXT_INCLUDE_DIR = "${lib.getDev gettext}/include";
+    GETTEXT_LIB_DIR = "${lib.getLib gettext}/lib";
+  };
+
   nativeBuildInputs = [
     cargo
     meson
@@ -48,6 +60,9 @@ stdenv.mkDerivation (finalAttrs: {
     glib
     gtk4
     libadwaita
+  ] ++ lib.optionals stdenv.isDarwin [
+    darwin.apple_sdk.frameworks.Foundation
+    libiconv
   ];
 
   meta = with lib; {