diff --git a/hosts/boreal/default.nix b/hosts/boreal/default.nix
index 45b7d44..c6d9c3f 100644
--- a/hosts/boreal/default.nix
+++ b/hosts/boreal/default.nix
@@ -22,7 +22,7 @@
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;
 
-  boot.tmpOnTmpfs = true;
+  boot.tmp.useTmpfs = true;
 
   boot.supportedFilesystems = [
     "btrfs"
diff --git a/hosts/hades/default.nix b/hosts/hades/default.nix
index 5e446aa..ddab4b7 100644
--- a/hosts/hades/default.nix
+++ b/hosts/hades/default.nix
@@ -24,7 +24,7 @@ in {
     devices = ["/dev/sda" "/dev/sdb"];
   };
 
-  boot.tmpOnTmpfs = true;
+  boot.tmp.UseTmpfs = true;
 
   networking.hostName = "hades"; # Define your hostname.
   networking.domain = "alarsyo.net";
diff --git a/hosts/zephyrus/default.nix b/hosts/zephyrus/default.nix
index 05355c7..4e1b423 100644
--- a/hosts/zephyrus/default.nix
+++ b/hosts/zephyrus/default.nix
@@ -20,7 +20,7 @@
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;
 
-  boot.tmpOnTmpfs = true;
+  boot.tmp.useTmpfs = true;
 
   services.btrfs = {
     autoScrub = {