diff --git a/hosts/build01/default.nix b/hosts/build01/default.nix
index cb7d7b0..4f7d294 100644
--- a/hosts/build01/default.nix
+++ b/hosts/build01/default.nix
@@ -7,6 +7,9 @@
     inputs.srvos.nixosModules.hardware-hetzner-online-amd
   ];
 
+  # zfs create zroot/writeback -V 128G
+  zramSwap.writebackDevice = "/dev/zvol/zroot/writeback";
+
   nix.settings.max-jobs = 24;
 
   nixpkgs.hostPlatform.gcc.arch = "znver2";