rpmbuild failing

[Ralph Blach <chipper us ibm com>]

this is my .rpmmacros file

%_topdir        /home/rcblach/redhat
%_builddir      %{_topdir}/BUILD
%_dbpath        %{_topdir}/rpm
%_var           %{_topdir}/var
%_usr           %{_topdir}/usr
%_defaultdocdir %{_topdir}/share/doc/packages
%_sourcedir     %{_topdir}/SOURCES
%_specdir       %{_topdir}/SPECS
%_srcrpmdir     %{_topdir}/SRPMS
%_rpmdir        %{_topdir}/RPMS


When I run rpmbuild --rebuild I get the followin error
What am I doing incorrect





rpmbuild --rebuild basesystem-8.0-2.src.rpm
Installing basesystem-8.0-2.src.rpm
Processing files: basesystem-8.0-2
Wrote: /home/rcblach/redhat/RPMS/noarch/basesystem-8.0-2.noarch.rpm
Executing(--clean): %{___build_cmd} 
/home/rcblach/redhat/var/tmp/rpm-tmp.93974
error: Exec of /home/rcblach/redhat/var/tmp/rpm-tmp.93974 failed 
(--clean): No such file or directory
error: Bad exit status from /home/rcblach/redhat/var/tmp/rpm-tmp.93974 
(--clean)

thanks

Chip