diff --git a/modules/system/nix.nix b/modules/system/nix.nix
index 74229f5..f815117 100644
--- a/modules/system/nix.nix
+++ b/modules/system/nix.nix
@@ -5,5 +5,6 @@
     daemonIOSchedClass = "idle";
     daemonCPUSchedPolicy = "idle";
     settings.trusted-users = [ "root" "user" ];
+    gc.automatic = true;
   };
 }
\ No newline at end of file