dist => {
              PREOP => './mk_README.sh',
              COMPRESS => 'gzip -9f',
            },
...
sub MY::postamble {
  return <<'EOF';
rpm: dist
    $(PERL) -i -pe 's/^(Version:\s*).*/$${1}$(VERSION)/' perl-IO-Handle-Record.spec
    rpmbuild -ba perl-IO-Handle-Record.spec
EOF
}