should work

system-config/services/minecraft/default.nix

@@ -20,6 +20,8 @@
             openFirewall = true;
             dataDir = "/var/lib/mcservers";
 
+            #managementSystem.systemd-socket.enable = true; #temp
+
             servers = {
 
                 vanilla = {
@@ -57,7 +59,7 @@
                     autoStart = true;
                     symlinks = {
                         "mods" = ./mods;
-                        "world/datapacks/portals_dp" = ./portals_dp;
+                        #"world/datapacks/portals_dp" = ./portals_dp;
                     };
                 };
             };