diff --git a/hosts/hime/default.nix b/hosts/hime/default.nix
index 300c2cb..e6ecee3 100644
--- a/hosts/hime/default.nix
+++ b/hosts/hime/default.nix
@@ -84,6 +84,12 @@
      experimental-features = nix-command flakes
      warn-dirty = false
     '';
+    settings.auto-optimise-store = true;
+    gc = {
+      automatic = true;
+      dates = "weekly";
+      options = "--delete-older-than 7d";
+    };
   };
 
   system.stateVersion = "23.05";
diff --git a/hosts/sutakku/default.nix b/hosts/sutakku/default.nix
index 0d6cb67..5cddaff 100644
--- a/hosts/sutakku/default.nix
+++ b/hosts/sutakku/default.nix
@@ -77,6 +77,12 @@
      experimental-features = nix-command flakes
      warn-dirty = false
     '';
+    settings.auto-optimise-store = true;
+    gc = {
+      automatic = true;
+      dates = "weekly";
+      options = "delete-older-than 7d";
+    };
   };
 
   system.stateVersion = "23.05";