diff --git a/nixos/common/modules/nixos.nix b/nixos/common/modules/nixos.nix
index 492767bb..ee16e3d3 100644
--- a/nixos/common/modules/nixos.nix
+++ b/nixos/common/modules/nixos.nix
@@ -1,6 +1,7 @@
 { ... }: { 
   nix = {
     settings = {
+      auto-optimise-store = true;
       experimental-features = [ "nix-command"  "flakes" ];
     };
     optimise = {