diff --git a/hosts/cryochamber/configuration.nix b/hosts/cryochamber/configuration.nix
index 2443741..4c83eb7 100644
--- a/hosts/cryochamber/configuration.nix
+++ b/hosts/cryochamber/configuration.nix
@@ -123,7 +123,7 @@
       yearly = 3;
       autosnap = false;
       autoprune = true;
-      recursive = true;
+      recursive = "zfs";
     };
 
     datasets."tank" = {
diff --git a/hosts/zima/configuration.nix b/hosts/zima/configuration.nix
index c5171ec..e85b970 100644
--- a/hosts/zima/configuration.nix
+++ b/hosts/zima/configuration.nix
@@ -161,7 +161,7 @@
       yearly = 1;
       autosnap = true;
       autoprune = true;
-      recursive = true;
+      recursive = "zfs";
     };
 
     datasets."bitrot" = {