1 files changed, 2 insertions, 2 deletions

diff --git a/usecases/server/hydra-server.nix b/usecases/server/hydra-server.nix
index db09a6e..28fb457 100644
--- a/usecases/server/hydra-server.nix
+++ b/usecases/server/hydra-server.nix
@@ -15,8 +15,8 @@ inputs:
   config = {
     services.hydra = {
       enable = true;
-      hydraURL = "https://hydra.${config.networking.fqdn}";
-      notificationSender = "hydra@${config.networking.fqdn}";
+      hydraURL = lib.mkDefault "https://hydra.${config.networking.fqdn}";
+      notificationSender = lib.mkDefault "hydra@${config.networking.fqdn}";
       buildMachinesFiles = [ ];
       # Don't build *everything* from source
       useSubstitutes = true;