From 605411a9fb10a8f12e56d428a5ea93e4dac07ca3 Mon Sep 17 00:00:00 2001
From: Massimiliano Culpo <massimiliano.culpo@gmail.com>
Date: Thu, 27 Oct 2022 14:17:54 +0200
Subject: LuaPackage: add missing attribute (#33551)

fixes #33544
---
 lib/spack/spack/build_systems/lua.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/spack/spack/build_systems/lua.py b/lib/spack/spack/build_systems/lua.py
index 48fa106881..f1c3e43704 100644
--- a/lib/spack/spack/build_systems/lua.py
+++ b/lib/spack/spack/build_systems/lua.py
@@ -20,6 +20,9 @@ class LuaPackage(spack.package_base.PackageBase):
     #: system base class
     build_system_class = "LuaPackage"
 
+    #: Legacy buildsystem attribute used to deserialize and install old specs
+    legacy_buildsystem = "lua"
+
     list_depth = 1  # LuaRocks requires at least one level of spidering to find versions
 
     build_system("lua")
-- 
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