diff --git a/minecraft/minecraft-servers.nix b/minecraft/minecraft-servers.nix
index f55e538..7bf4699 100644
--- a/minecraft/minecraft-servers.nix
+++ b/minecraft/minecraft-servers.nix
@@ -112,16 +112,16 @@ in
     (lib.mkIf (config.networking.hostName == "loadedskypotato") {
       services.nginx.streamConfig = ''
         server {
-          listen ${survivalPort} reuseport;
-          proxy_pass 10.100.0.2:${survivalPort};
+          listen ${builtins.toString survivalPort} reuseport;
+          proxy_pass 10.100.0.2:${builtins.toString survivalPort};
         }
         server {
-          listen ${creativePort} reuseport;
-          proxy_pass 10.100.0.2:${creativePort};
+          listen ${builtins.toString creativePort} reuseport;
+          proxy_pass 10.100.0.2:${builtins.toString creativePort};
         }
         server {
-          listen ${cobblemonPort} reuseport;
-          proxy_pass 10.100.0.2:${cobblemonPort};
+          listen ${builtins.toString cobblemonPort} reuseport;
+          proxy_pass 10.100.0.2:${builtins.toString cobblemonPort};
         }
       '';