diff --git a/pkgs/nixfiles/nixfiles-trigger-system-upgrade.nix b/pkgs/nixfiles/nixfiles-trigger-system-upgrade.nix
new file mode 100644
index 0000000..2c980d9
--- /dev/null
+++ b/pkgs/nixfiles/nixfiles-trigger-system-upgrade.nix
@@ -0,0 +1,10 @@
+{ pkgs, ... }:
+
+pkgs.writeShellApplication {
+  name = "nixfiles-trigger-system-upgrade";
+  text = builtins.readFile ./nixfiles-trigger-system-upgrade.sh;
+  runtimeInputs = with pkgs; [
+    pssh
+  ];
+}
+
diff --git a/pkgs/nixfiles/nixfiles-trigger-system-upgrade.sh b/pkgs/nixfiles/nixfiles-trigger-system-upgrade.sh
new file mode 100755
index 0000000..a91d7be
--- /dev/null
+++ b/pkgs/nixfiles/nixfiles-trigger-system-upgrade.sh
@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+TARGETS="$(nix --extra-experimental-features "nix-command flakes" eval --raw ".#nixosConfigurations" --apply "nixosConfigurations: builtins.concatStringsSep \"\\n\" (builtins.attrValues (builtins.mapAttrs (name: host: host.config.networking.fqdn) nixosConfigurations))")"
+
+pssh -h <(echo "${TARGETS}") -i -- sudo systemctl start clerie-system-auto-upgrade.service --no-block
diff --git a/pkgs/overlay.nix b/pkgs/overlay.nix
index 5bb0aca..a6b0cd9 100644
--- a/pkgs/overlay.nix
+++ b/pkgs/overlay.nix
@@ -22,6 +22,7 @@ final: prev: {
   nixfiles-auto-install = final.callPackage ./nixfiles/nixfiles-auto-install.nix {};
   nixfiles-generate-config = final.callPackage ./nixfiles/nixfiles-generate-config.nix {};
   nixfiles-generate-backup-secrets = final.callPackage ./nixfiles/nixfiles-generate-backup-secrets.nix {};
+  nixfiles-trigger-system-upgrade = final.callPackage ./nixfiles/nixfiles-trigger-system-upgrade.nix {};
   nixfiles-update-ssh-host-keys = final.callPackage ./nixfiles/nixfiles-update-ssh-host-keys.nix {};
   pipewire-all-bluetooth = final.callPackage ./pipewire-all-bluetooth {};
   print-afra = final.callPackage ./print-afra {};