zon2nix: fix build on Darwin (#365113)

Changed files
+3
pkgs
by-name
zo
zon2nix
+3
pkgs/by-name/zo/zon2nix/package.nix
···
fetchFromGitHub,
zig_0_11,
nix,
+
apple-sdk_11,
}:
stdenv.mkDerivation rec {
···
nativeBuildInputs = [
zig_0_11.hook
];
+
+
buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ apple-sdk_11 ];
zigBuildFlags = [
"-Dnix=${lib.getExe nix}"