diff --git a/capibara.nix b/capibara.nix
index 6b062eb..751e2c0 100644
--- a/capibara.nix
+++ b/capibara.nix
@@ -16,6 +16,13 @@ in {
   };
 
   fileSystems = {
+
+    "/mnt/btr_root" = {
+      device = "/dev/mapper/root";
+      fsType = "btrfs";
+      options = [ "subvolid=5" "compress=zstd" ];
+    };
+
     "/persist" = {
       device = "/dev/mapper/root";
       fsType = "btrfs";
diff --git a/trantor.nix b/trantor.nix
index d080f86..8cd1453 100644
--- a/trantor.nix
+++ b/trantor.nix
@@ -20,6 +20,18 @@ in {
       fsType = "vfat";
     };
 
+    "/mnt/btr_system" = {
+      device = "/dev/mapper/system";
+      fsType = "btrfs";
+      options = [ "subvolid=5" "compress=zstd" ];
+    };
+
+    "/mnt/btr_user" = {
+      device = "/dev/mapper/user";
+      fsType = "btrfs";
+      options = [ "subvolid=5" "compress=zstd" ];
+    };
+
     "/persist" = {
       device = "/dev/mapper/user";
       fsType = "btrfs";