nix: drop the recent patch on darwin, fixing build (NixOS#469207)

Author: vcunat

pkgs/tools/package-management/nix/default.nix

@@ -178,13 +178,14 @@ lib.makeExtensible (
             hash = "sha256-NLGXPLjENLeKVOg3OZgHXZ+1x6sPIKq9FHH8pxbCrDI=";
           };
         }).appendPatches
-          [
-            (fetchpatch2 {
+          (
+            # issues on darwin: https://github.com/NixOS/nixpkgs/pull/468208#issuecomment-3626314109
+            lib.optional stdenv.isLinux (fetchpatch2 {
               name = "nix-2.31-14240-sri-error-message.patch";
               url = "https://github.com/NixOS/nix/commit/56751b1cd2c4700c71c545f2246adf602c97fdf5.patch";
               hash = "sha256-CerSBAI+H2RqPp9jsCP0QIM2rZYx3yBZHVVUAztgc18=";
             })
-          ];
+          );
 
       nix_2_31 = addTests "nix_2_31" self.nixComponents_2_31.nix-everything;