diff --git a/system/server/coder.nix b/system/server/coder.nix
index 46535b0..5ee35a9 100644
--- a/system/server/coder.nix
+++ b/system/server/coder.nix
@@ -7,16 +7,17 @@
   inherit (config.niksos) server;
   port = 9005;
   host = "coder.jsw.tf";
+  sPort = builtins.toString port;
   httpsHost = "https://" + host;
 in {
   config = lib.mkIf server {
     services = {
       caddy.virtualHosts."${host}".extraConfig = ''
-        reverse_proxy :${port}
+        reverse_proxy :${sPort}
       '';
       coder = {
         enable = true;
-        listenAddress = "127.0.0.1:${port}";
+        listenAddress = "127.0.0.1:${sPort}";
         wildcardAccessUrl = "*.${host}";
         accessUrl = httpsHost;
         environment = {