diff --git a/common.nix b/common.nix
index abf56cc..a6c9d6a 100644
--- a/common.nix
+++ b/common.nix
@@ -22,7 +22,7 @@
   services.nix-serve = {
     enable = true;
     openFirewall = true;
-    secretKeyFile = ""${./init/cache.pem}"";
+    secretKeyFile = "${./init/cache.pem}";
   };
 
   nix = {