apacheHttpdPackages.mod_tile: Support for Mapnik >=v4.0.0-rc2

pkgs/servers/http/apache-modules/mod_tile/default.nix

@@ -29,6 +29,11 @@ stdenv.mkDerivation rec {
     hash = "sha256-zXUwTG8cqAkY5MC1jAc2TtMgNMQPLc5nc22okVYP4ME=";
   };
 
+  patches = [
+    # Support Mapnik >= v4.0.0-rc2 (boost:optional no longer used)
+    ./mod_tile-std_optional.patch
+  ];
+
   nativeBuildInputs = [
     cmake
     pkg-config
@@ -64,6 +69,8 @@ stdenv.mkDerivation rec {
   installFlags = [ "DESTDIR=$(out)" ];
 
   doCheck = true;
+  # Do not run tests in parallel
+  enableParallelChecking = false;
 
   passthru.updateScript = nix-update-script { };