diff --git a/ops/nixos/lib/coredns/default.nix b/ops/nixos/lib/coredns/default.nix
index 446403b4b1..113e9a09a0 100644
--- a/ops/nixos/lib/coredns/default.nix
+++ b/ops/nixos/lib/coredns/default.nix
@@ -3,7 +3,7 @@
 {
   config = {
     environment.etc."coredns-zones" = {
-      source = ./zones;
+      source = "${./zones}";
     };
 
     networking.firewall.allowedTCPPorts = [