diff --git a/nixos/common/default.nix b/nixos/common/default.nix
index 74f7da7..fbfd26a 100644
--- a/nixos/common/default.nix
+++ b/nixos/common/default.nix
@@ -12,6 +12,7 @@
   ];
 
   nix.settings.experimental-features = [ "nix-command" "flakes" ];
+  nix.settings.auto-optimise-store = true;
 
   nixpkgs.config.allowUnfree = true;