print "Fixing PREOP in the Makefile to copy files with spaces during building\n";

  my $commands = q{; \$(CP) t/mailboxes/*\\\\ * \$(DISTVNAME)/t/mailboxes; \$(CP) t/results/*\\\\ * \$(DISTVNAME)/t/results};

  system "$^X -pi -e 's|^(PREOP\\s*=.*)|\$1$commands|' Makefile";