--- LuaJIT-old/Makefile	2021-03-11 01:19:04.000000000 +0600
+++ LuaJIT-new/Makefile	2021-07-05 09:41:36.271253147 +0600
@@ -25,7 +25,7 @@
 # Change the installation path as needed. This automatically adjusts
 # the paths in src/luaconf.h, too. Note: PREFIX must be an absolute path!
 #
-export PREFIX= /usr/local
+export PREFIX?= /usr/local
 export MULTILIB= lib
 ##############################################################################