diff --git a/hosts/ami/default.nix b/hosts/ami/default.nix
index 4b6784a..4c4e5ab 100644
--- a/hosts/ami/default.nix
+++ b/hosts/ami/default.nix
@@ -41,10 +41,16 @@
 
   systemd = {
     services.register-thing = {
-      serviceConfig = {
+      serviceConfig = let
+        script = pkgs.writeShellApplication {
+          name = "run-thing";
+          runtimeInputs = with pkgs; [nix];
+          text = "/home/maintainer/register-thing/thing";
+        };
+      in {
         Type = "oneshot";
         User = "maintainer";
-        ExecStart = "/home/maintainer/register-thing/thing";
+        ExecStart = "${script}/bin/run-thing";
       };
     };