mesa: fix build on Darwin

- remove merged patch
- add new python3.12 dep

pkgs/development/libraries/mesa/darwin.nix

@@ -18,13 +18,6 @@ let
 in stdenv.mkDerivation {
   inherit (common) pname version src meta;
 
-  patches = [
-    # Reorder things to make it build on Darwin again
-    # Submitted upstream: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29592
-    # FIXME: remove when merged or otherwise addressed
-    ./darwin.patch
-  ];
-
   outputs = [ "out" "dev" ];
 
   nativeBuildInputs = [
@@ -33,6 +26,7 @@ in stdenv.mkDerivation {
     meson
     ninja
     pkg-config
+    python3Packages.packaging
     python3Packages.python
     python3Packages.mako
   ];

pkgs/development/libraries/mesa/darwin.patch

@@ -1,17 +0,0 @@
-diff --git a/src/glx/glxext.c b/src/glx/glxext.c
-index 8770863eb7c..537f0af112c 100644
---- a/src/glx/glxext.c
-+++ b/src/glx/glxext.c
-@@ -886,10 +886,11 @@ __glXInitialize(Display * dpy)
-    Bool zink = False;
-    Bool try_zink = False;
- 
-+   const char *env = getenv("MESA_LOADER_DRIVER_OVERRIDE");
-+
- #if defined(GLX_DIRECT_RENDERING) && (!defined(GLX_USE_APPLEGL) || defined(GLX_USE_APPLE))
-    Bool glx_direct = !debug_get_bool_option("LIBGL_ALWAYS_INDIRECT", false);
-    Bool glx_accel = !debug_get_bool_option("LIBGL_ALWAYS_SOFTWARE", false);
--   const char *env = getenv("MESA_LOADER_DRIVER_OVERRIDE");
- 
-    zink = env && !strcmp(env, "zink");
-    try_zink = False;