diff --git a/hosts/containers/hydra/hydra.nix b/hosts/containers/hydra/hydra.nix
index 32b77e6b..d4890c56 100644
--- a/hosts/containers/hydra/hydra.nix
+++ b/hosts/containers/hydra/hydra.nix
@@ -45,6 +45,9 @@ in {
       '';
     });
     useSubstitutes = true;
+    extraConfig = ''
+      max_output_size = 4294967296
+    '';
   };
 
   services.nginx =