diff --git a/servers/hydra.nix b/servers/hydra.nix
index bcfadb1..2696482 100644
--- a/servers/hydra.nix
+++ b/servers/hydra.nix
@@ -1,4 +1,4 @@
-{ ... }:
+{ lib, ... }:
 let
   domain = "ci.sinerva.eu";
 in
@@ -54,5 +54,11 @@ in
         maxJobs = 6;
       }
     ];
+
+    gc = {
+      options = lib.mkForce "--delete-older-than 1d";
+      dates = lib.mkForce "hourly";
+      randomizedDelaySec = lib.mkForce "0";
+    };
   };
 }