diff --git a/config/profiles/builder.nix b/config/profiles/builder.nix
index 5e21669..8e81522 100644
--- a/config/profiles/builder.nix
+++ b/config/profiles/builder.nix
@@ -1,6 +1,5 @@
 { lib, pkgs, ... }: {
   kyouma.deployment.auto-upgrade.cache = "daemon";
-  nix.gc.options = lib.mkForce "--delete-older-than 30d";
   nix.settings = {
     trusted-users = [ "nix-ssh" ];
     #system-features = [ "nixos-test" "benchmark" "big-parallel" "kvm" ] ++ lib.optionals pkgs.hostPlatform.isx86_64 [ "gccarch-x86-64-v3" ];
diff --git a/config/services/hydra/nix-config.nix b/config/services/hydra/nix-config.nix
index 016887b..18bfc0e 100644
--- a/config/services/hydra/nix-config.nix
+++ b/config/services/hydra/nix-config.nix
@@ -35,6 +35,7 @@
       supportedFeatures = [ "nixos-test" "benchmark" "big-parallel" "gccarch-x86-64" "gccarch-x86-64-v2" "gccarch-x86-64-v3" ];
       sshKey = config.sops.secrets."services/hydra/id_ed25519_hydra".path;
   });
+  nix.gc.options = lib.mkForce "--delete-older-than 90d";
   nix.settings = {
     allowed-uris = [
       "github:"