diff --git a/hosts/hydra/hydra.nix b/hosts/hydra/hydra.nix
index 2b4d8cf7..7801bfcb 100644
--- a/hosts/hydra/hydra.nix
+++ b/hosts/hydra/hydra.nix
@@ -30,7 +30,10 @@
           '';
         };
 
-        nixpkgs.overlays = [ self.overlay ];
+        nixpkgs = {
+          # config.contentAddressedByDefault = true;
+          overlays = [ self.overlay ];
+        };
 
         services = {
           hydra-dev = lib.recursiveUpdate config.services.hydra-dev {