diff -ruwN source/src/ldo.c source-new/src/ldo.c
--- source/src/ldo.c	2024-06-13 22:15:09.000000000 +0000
+++ source-new/src/ldo.c	2026-09-30 05:11:35.697677914 +0000
@@ -60,7 +60,7 @@
 	try { a } catch(...) { if ((c)->status == 0) (c)->status = -1; }
 #define luai_jmpbuf		int  /* dummy variable */
 
-#elif defined(LUA_USE_POSIX)				/* }{ */
+#elif defined(LUA_USE_POSIX) && !defined(__redox__)	/* }{ */
 
 /* in POSIX, try _longjmp/_setjmp (more efficient) */
 #define LUAI_THROW(L,c)		_longjmp((c)->b, 1)