From 7115040e19fa4cd20028f8b4a37ba44a993029af Mon Sep 17 00:00:00 2001
From: Ryan Burns <rtburns@protonmail.com>
Date: Wed, 30 Dec 2020 19:00:32 -0800
Subject: [PATCH] mesa: fix build on darwin

Latest mesa requires macOS SDK 10.13 - this applies an upstream
patch for compatibility with 10.13

Applied on darwin only to avoid linux rebuilds in staging-next - left a
note that this can be done unconditionally as it has no effect on
non-darwin platforms, if this would be considered more robust.
---
 pkgs/development/libraries/mesa/default.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/development/libraries/mesa/default.nix b/pkgs/development/libraries/mesa/default.nix
index 0e18164e6f2..c96d1edfadf 100644
--- a/pkgs/development/libraries/mesa/default.nix
+++ b/pkgs/development/libraries/mesa/default.nix
@@ -65,6 +65,13 @@ stdenv.mkDerivation {
       url = "https://gitlab.freedesktop.org/mesa/mesa/commit/aebbf819df6d1e.patch";
       sha256 = "17248hyzg43d73c86p077m4lv1pkncaycr3l27hwv9k4ija9zl8q";
     })
+  ] ++ stdenv.lib.optionals stdenv.isDarwin [
+    # Fix for pre macOS SDK 10.13
+    # TODO(r-burns) can be applied unconditionally, at the cost of a mass linux rebuild
+    (fetchpatch {
+      url = "https://gitlab.freedesktop.org/mesa/mesa/-/commit/f4403f70fe5bf2ec41af5546122f0d78caffa984.patch";
+      sha256 = "03j2aj255m7ms848nkb41vj3s3yb72zb5rz3w3fzp5l9wzzargw5";
+    })
   ];
 
   postPatch = ''