diff --git a/configuration.nix b/configuration.nix
index 72a46e9..2a5bf0d 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -119,6 +119,13 @@
       extraOptions = ''
         experimental-features = nix-command flakes
       '';
+
+      gc = {
+        automatic = true;
+        persistent = true;
+        dates = "weekly";
+        options = "--delete-older-than 7d";
+      };
     };
 
     system = {