diff --git a/hosts/hydra/hydra.nix b/hosts/hydra/hydra.nix
index b08ae188..8b528033 100644
--- a/hosts/hydra/hydra.nix
+++ b/hosts/hydra/hydra.nix
@@ -52,8 +52,10 @@
   };
 
   nix = {
-    extraOptions = ''
+    extraOptions = lib.mkForce ''
       allowed-uris = http:// https:// ssh://
+      builders-use-substitutes = true
+      experimental-features = ca-derivations nix-command flakes
     '';
     trustedUsers = [ "hydra" "root" ];
     buildMachines = [{