diff --git a/faucet/id/default.nix b/faucet/id/default.nix
new file mode 100644
index 00000000..075efe43
--- /dev/null
+++ b/faucet/id/default.nix
@@ -0,0 +1,16 @@
+{ pkgs
+, lib
+, config
+, ... }: with lib; let
+  cfg = config.faucet.id;
+in {
+  options.faucet.id = mkOption {
+    type = with types; str;
+    description = "systemd machine id";
+  };
+
+  config = {
+    environment.etc.machine-id.text = cfg + "\n";
+    networking.hostId = substring 0 8 cfg;
+  };
+}