From f6338803b1537fe7001e2747a41d4ec57de1a0e9 Mon Sep 17 00:00:00 2001
From: Charlie Root <charlie@charlieroot.dev>
Date: Fri, 1 Nov 2024 13:50:12 +0100
Subject: [PATCH] system/moudule.nix: add machine-id

---
 modules/system/module.nix | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/modules/system/module.nix b/modules/system/module.nix
index d571ea1..8fc29c9 100644
--- a/modules/system/module.nix
+++ b/modules/system/module.nix
@@ -1,4 +1,6 @@
-{
+{config, ...}: let
+  machine-id = builtins.substring 0 23 (builtins.hashString "sha256" config.networking.hostName);
+in {
   system = {
     # faster rebuilds
     switch = {
@@ -8,4 +10,5 @@
     # our state version
     stateVersion = "23.11";
   };
+  environment.etc."machine-id".text = "${machine-id}\n";
 }