diff --git a/hosts/mobile-box/configuration.nix b/hosts/mobile-box/configuration.nix
index 85e0ce9..441e674 100644
--- a/hosts/mobile-box/configuration.nix
+++ b/hosts/mobile-box/configuration.nix
@@ -19,6 +19,7 @@
     gc = {
       automatic = true;
       dates = "daily";
+      options = "--delete-old";
     };
   };
 
diff --git a/hosts/tetra-zw/configuration.nix b/hosts/tetra-zw/configuration.nix
index d0b9aba..696089a 100644
--- a/hosts/tetra-zw/configuration.nix
+++ b/hosts/tetra-zw/configuration.nix
@@ -18,6 +18,7 @@
     gc = {
       automatic = true;
       dates = "daily";
+      options = "--delete-old";
     };
   };
 
diff --git a/modules/traffic-stop-box/configuration.nix b/modules/traffic-stop-box/configuration.nix
index 7625cb8..be2e8a5 100644
--- a/modules/traffic-stop-box/configuration.nix
+++ b/modules/traffic-stop-box/configuration.nix
@@ -14,6 +14,7 @@
     gc = {
       automatic = true;
       dates = "daily";
+      options = "--delete-old";
     };
   };