diff -Naur a/configure.ac litecoin-0.21.4/configure.ac
--- a/configure.ac	2026-02-27 04:32:01.298721439 +0100
+++ b/configure.ac	2026-02-27 04:32:16.629001748 +0100
@@ -1313,7 +1313,6 @@
 if test x$want_boost = xno; then
     AC_MSG_ERROR([[only libbitcoinconsensus can be built without boost]])
 fi
-AX_BOOST_SYSTEM
 AX_BOOST_FILESYSTEM
 AX_BOOST_THREAD