diff --git a/systems/configuration.nix b/systems/configuration.nix
index dd86329..15ab3da 100644
--- a/systems/configuration.nix
+++ b/systems/configuration.nix
@@ -187,11 +187,21 @@
       connect-timeout = 20;
     };
 
+    extraOptions = ''
+      min-free = ${toString (100 * 1024 * 1024)}
+      max-free = ${toString (1024 * 1024 * 1024)}
+    '';
+
     gc = {
       automatic = true;
       dates = "weekly";
       options = "--delete-older-than 30d";
     };
+
+    optimize = {
+      automatic = true;
+      dates = [ "01:00" ];
+    };
   };
 
   system = {