diff --git a/nixos/modules/services/monitoring/munin.nix b/nixos/modules/services/monitoring/munin.nix
index 0ec201a0eb1..cc6d51f0ef1 100644
--- a/nixos/modules/services/monitoring/munin.nix
+++ b/nixos/modules/services/monitoring/munin.nix
@@ -215,9 +215,11 @@ in
       };
     };
 
-    system.activationScripts.munin-cron = stringAfter [ "users" "groups" ] ''
-      mkdir -p /var/{run,log,www,lib}/munin
-      chown -R munin:munin /var/{run,log,www,lib}/munin
-    '';
+    systemd.tmpfiles.rules = [
+      "d /var/run/munin 0755 munin munin -"
+      "d /var/log/munin 0755 munin munin -"
+      "d /var/www/munin 0755 munin munin -"
+      "d /var/lib/munin 0755 munin munin -"
+    ];
   })];
 }