diff --git a/nixos/machines/driftwood/configuration.nix b/nixos/machines/driftwood/configuration.nix
index 0b479ad..6df213e 100644
--- a/nixos/machines/driftwood/configuration.nix
+++ b/nixos/machines/driftwood/configuration.nix
@@ -77,4 +77,11 @@
       upper = "05:00";
     };
   };
+
+  # Setup garbage collection, keep the past month
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+      options = "--delete-older-than 30d";
+  };
 }