gtk2-x11: fix darwin build

pkgs/development/libraries/gtk+/2.0-darwin-x11.patch

@@ -0,0 +1,22 @@
+--- a/gdk/x11/gdkapplaunchcontext-x11.c
++++ b/gdk/x11/gdkapplaunchcontext-x11.c
+@@ -26,7 +26,6 @@
+ #include <unistd.h>
+ 
+ #include <glib.h>
+-#include <gio/gdesktopappinfo.h>
+ 
+ #include "gdkx.h"
+ #include "gdkapplaunchcontext.h"
+@@ -363,10 +362,7 @@
+   else
+     workspace_str = NULL;
+ 
+-  if (G_IS_DESKTOP_APP_INFO (info))
+-    application_id = g_desktop_app_info_get_filename (G_DESKTOP_APP_INFO (info));
+-  else
+-    application_id = NULL;
++  application_id = NULL;
+ 
+   startup_id = g_strdup_printf ("%s-%lu-%s-%s-%d_TIME%lu",
+                                 g_get_prgname (),

pkgs/development/libraries/gtk+/2.x.nix

@@ -32,10 +32,13 @@ stdenv.mkDerivation rec {
   patches = [
     ./2.0-immodules.cache.patch
     ./gtk2-theme-paths.patch
-  ] ++ optional stdenv.isDarwin (fetchpatch {
-    url = https://bug557780.bugzilla-attachments.gnome.org/attachment.cgi?id=306776;
-    sha256 = "0sp8f1r5c4j2nlnbqgv7s7nxa4cfwigvm033hvhb1ld652pjag4r";
-  });
+  ] ++ optionals stdenv.isDarwin [
+    (fetchpatch {
+      url = https://bug557780.bugzilla-attachments.gnome.org/attachment.cgi?id=306776;
+      sha256 = "0sp8f1r5c4j2nlnbqgv7s7nxa4cfwigvm033hvhb1ld652pjag4r";
+    })
+    ./2.0-darwin-x11.patch
+  ];
 
   propagatedBuildInputs = with xorg;
     [ glib cairo pango gdk_pixbuf atk ]