diff --git a/nix/configurations/vanadium/nixos/sane-nix.nix b/nix/configurations/vanadium/nixos/sane-nix.nix
index 83c080d8..bb710e8e 100644
--- a/nix/configurations/vanadium/nixos/sane-nix.nix
+++ b/nix/configurations/vanadium/nixos/sane-nix.nix
@@ -1,8 +1,11 @@
 # Protect my system from running out of storage or memory
+let
+  totalStorage = 930;
+in
 {
   nix.settings = {
-    min-free = 50 * 1024 * 1024 * 1024;
-    max-free = 100 * 1024 * 1024 * 1024;
+    min-free = builtins.ceil (totalStorage * 0.2) * 1024 * 1024 * 1024;
+    max-free = builtins.ceil (totalStorage * 0.3) * 1024 * 1024 * 1024;
   };
 
   systemd.services.nix-daemon.serviceConfig = {