diff -urNp -x '*.orig' bacula-13.0.3.org/autoconf/configure.in bacula-13.0.3/autoconf/configure.in
--- bacula-13.0.3.org/autoconf/configure.in	2023-07-17 10:50:33.378003560 +0200
+++ bacula-13.0.3/autoconf/configure.in	2023-07-17 10:50:33.571006302 +0200
@@ -16,7 +16,7 @@ TOP_DIR=`pwd`
 cd ${BUILD_DIR}
 AC_SUBST(BUILD_DIR)
 AC_SUBST(TOP_DIR)
-AC_CONFIG_AUX_DIR(${BUILD_DIR}/autoconf)
+AC_CONFIG_AUX_DIR(autoconf)
 AC_CONFIG_HEADERS(src/config.h:autoconf/config.h.in)
 
 dnl minimal Win32 stuff for "make clean"