Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: Ericson2314

nix/nixos-module.nix

@@ -84,8 +84,9 @@ in
     users.groups.${cfg.group} = { };
 
     systemd.tmpfiles.rules = [
-      "d ${cfg.stateDir}       0750 ${cfg.user} ${cfg.group} -"
-      "d ${cfg.stateDir}/state 0750 ${cfg.user} ${cfg.group} -"
+      "d ${cfg.stateDir}           0750 ${cfg.user} ${cfg.group} -"
+      "d ${cfg.stateDir}/state     0750 ${cfg.user} ${cfg.group} -"
+      "d ${cfg.stateDir}/state/tmp 0750 ${cfg.user} ${cfg.group} -"
     ];
 
     systemd.services.hackage-server = {