diff --git a/lib/deploy.nix b/lib/deploy.nix
index 82c2fa6..e9f0b69 100644
--- a/lib/deploy.nix
+++ b/lib/deploy.nix
@@ -67,8 +67,15 @@ let
         $c exec -- '[ "$(echo '"'$j'"' | jq -r .$(hostname))" = "$(readlink /run/current-system)" ]'
       '';
 
+      check-reboots = pkgs.writeShellScript "check-reboots" ''
+        set -eu
+        export SSH_CONFIG_FILE=${sshConfig}
+        c="${pkgs.colmena}/bin/colmena"
+        $c exec -- '[ "$(readlink /run/booted-system/kernel)" = "$(readlink /run/current-system/kernel)" ]'
+      '';
+
     in
-    { inherit check-updates jump livecd-deploy pkgs sshConfig; };
+    { inherit check-updates check-reboots jump livecd-deploy pkgs sshConfig; };
 
 in
 {
@@ -80,6 +87,7 @@ in
         alias ssh='ssh -F${sshConfig}'
         alias jump=${jump}
         alias check-updates=${check-updates}
+        alias check-reboots=${check-reboots}
         alias livecd-deploy=${livecd-deploy}
         alias c=colmena
       '';
diff --git a/modules/cli/default.nix b/modules/cli/default.nix
index 39c1272..1579358 100644
--- a/modules/cli/default.nix
+++ b/modules/cli/default.nix
@@ -53,20 +53,6 @@
       print("compression ratio:", orig_data_size/mem_used_total)
     '')
 
-    (writeShellScriptBin "nixos-check-reboot" ''
-      set -e
-      booted="$(readlink /run/booted-system/kernel)"
-      current="$(readlink /run/current-system/kernel)"
-      if [ "$booted" = "$current" ]
-      then
-          echo OK
-          exit 0
-      else
-          echo REBOOT NEEDED
-          exit 1
-      fi
-    '')
-
     (writeScriptBin "zfsram" ''
       #!${pkgs.python3}/bin/python
       for ln in open('/proc/spl/kstat/zfs/arcstats').readlines():