diff --git a/hosts/dalinar/default.nix b/hosts/dalinar/default.nix
index f1ad30c..a762fb6 100644
--- a/hosts/dalinar/default.nix
+++ b/hosts/dalinar/default.nix
@@ -34,6 +34,12 @@
     };
   };
 
+  nix.gc = {
+    automatic = true;
+    dates = "weekly";
+    options = "--delete-older-than 30d";
+  };
+
   networking = {
     hostName = "dalinar";
     nftables.enable = true;