diff --git a/hosts/dacbert/default.nix b/hosts/dacbert/default.nix
index e013c409..6f55bfde 100644
--- a/hosts/dacbert/default.nix
+++ b/hosts/dacbert/default.nix
@@ -52,6 +52,7 @@
     ];
 
     tmpOnTmpfs = true;
+    tmpOnTmpfsSize = "80%";
   };
   # hardware.raspberry-pi."4" = {
   #   fkms-3d.enable = true;