One line in mysql_install_db.sh was left unfixed.
@ -291,7 +291,7 @@ then
fi
srcpkgdatadir=`find_in_basedir --dir fill_help_tables.sql share share/mysql`
buildpkgdatadir=$srcpkgdatadir
if test -z "$pkgdatadir"
if test -z "$srcpkgdatadir"
then
cannot_find_file fill_help_tables.sql $basedir/share $basedir/share/mysql
exit 1