diff --git a/setup.py b/setup.py
index 1f0a6023..b855d64e 100644
--- a/setup.py
+++ b/setup.py
@@ -264,7 +264,7 @@ def use_bundled_lua(path, macros):
     # Parse .o files from 'makefile'
     makefile = os.path.join(path, "makefile")
     # Source code of Lua 5.1.5 and 5.2.4 are downloaded from https://www.lua.org/ftp
-    if not os.path.exists(makefile):
+    if 'lua51' in path or 'lua52' in path:
         makefile = os.path.join(path, "src", "Makefile")
     match_var = re.compile(r"(CORE|AUX|LIB|ALL)_O\s*=(.*)").match
     is_indented = re.compile(r"\s+").match