diff --git a/nixos/roles/nix.nix b/nixos/roles/nix.nix
index 77d110f..965143e 100644
--- a/nixos/roles/nix.nix
+++ b/nixos/roles/nix.nix
@@ -11,10 +11,14 @@
       builders-use-substitutes = true;
     };
     gc = {
-      persistent = false;
+      persistent = true;
       dates = "weekly";
       options = "-d";
       randomizedDelaySec = "5h";
     };
+    optimise = {
+      dates = [];
+      automatic = true;
+    };
   };
 }