diff --git a/configuration.nix b/configuration.nix
index e5c8703..24311b1 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -32,9 +32,10 @@
 
   # Run Nix garbage collector, while avoiding compiling
   nix = {
+    autoOptimiseStore = true;
     gc = {
       automatic = true;
-      options = "--delete-older-than 14d";
+      options = "--delete-older-than 7d";
       dates = "14:30";
     };
     extraOptions = ''