diff --git a/configuration.nix b/configuration.nix
index 3837047..efb524c 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -72,7 +72,7 @@
 
   # Run Nix garbage collector, while avoiding recompilation
   nix = {
-    autoOptimiseStore = true;
+    settings.auto-optimise-store = true;
     gc = {
       automatic = true;
       options = "--delete-older-than 14d";