contrib/packaging/dockerrpm

--- a/contrib/packaging/dockerrpm	Fri Jun 15 00:50:48 2018 +0530
+++ b/contrib/packaging/dockerrpm	Sat May 12 15:51:37 2018 -0700
@@ -16,6 +16,8 @@
 $ROOTDIR/contrib/packaging/buildrpm --rpmbuilddir $RPMBUILDDIR --prepare $*
 
 DSHARED=/mnt/shared
+DBUILDUSER=build
+
 $DOCKER run -e http_proxy -e https_proxy -u $DBUILDUSER --rm -v $RPMBUILDDIR:$DSHARED $CONTAINER \
     rpmbuild --define "_topdir $DSHARED" -ba $DSHARED/SPECS/mercurial.spec --clean