diff --git a/lib/hq.nix b/lib/hq.nix
index 1ac49121..c9611109 100644
--- a/lib/hq.nix
+++ b/lib/hq.nix
@@ -9,7 +9,7 @@ in {
 
   nix = {
     binaryCaches = [ ]
-      ++ (lib.optional notHydra "http://hydra.hq.c3d2.de:${port}")
+      ++ (lib.optional notHydra "https://nix-serve.hq.c3d2.de")
       ++ (lib.optional notServer7 "http://server7.hq.c3d2.de:${port}");
 
     binaryCachePublicKeys = [