--- a/configure.ac	2020-12-22 07:44:15.000000000 +0100
+++ b/configure.ac	2026-01-21 07:38:30.094905287 +0100
@@ -245,8 +245,7 @@
                                 dnl  cross-platform C++ extensions
 AS_IF([test xyes != x$with_included_boost],
   [AX_BOOST_BASE([1.49.0],
-     [AX_BOOST_SYSTEM
-      AX_BOOST_FILESYSTEM
+     [AX_BOOST_FILESYSTEM
       AX_BOOST_IOSTREAMS
       AX_BOOST_PROGRAM_OPTIONS
       AS_IF([test $__cplusplus -lt 201103], [AX_BOOST_REGEX])