diff --git a/plugins/pck-update.in b/plugins/pck-update.in
index fdc8a9b..9a3c505 100644
--- a/plugins/pck-update.in
+++ b/plugins/pck-update.in
@@ -2112,7 +2112,8 @@ ${proxy:+--proxy $proxy} ${proxy_user:+--proxy-user $proxy_user} \
 --define=\"%_specdir $spec_dir\" \
 --define=\"%_sourcedir $source_dir\" \
 --define=\"%_builddir $build_dir\" \
---define=\"%_tmppath $tmppath_dir\""
+--define=\"%_tmppath $tmppath_dir\" \
+--define=\"%_buildrootdir $tmppath_dir\""
 
        # [ "$rpm_rootdir" ] &&
        #    rpmbuild_opts="$rpmbuild_opts $rpm_root_opts"