Custom DIST_DEFAULT and PREOP causing failure with ExtUtils::MakeMaker 6.21

[Tim Bunce]

I've just tried out ExtUtils::MakeMaker 6.21 with perl 5.8.2 and DBI.

My DBI Makefile.PL has

    dist  => {
        DIST_DEFAULT=> 'clean distcheck disttest ci tardist',
        PREOP => '$(MAKE) -f Makefile.old distdir',
        COMPRESS => 'gzip -v9', SUFFIX => 'gz',
    },

and when I do a make dist it now ends with:

    tar cvf DBI-1.39.tar DBI-1.39
    DBI-1.39/
    DBI-1.39/t/
    ...
    rm -rf DBI-1.39
    gzip -v9 DBI-1.39.tar
    DBI-1.39.tar:            71.0% -- replaced with DBI-1.39.tar.gz
    Makefile out-of-date with respect to Makefile.PL 
/usr/local/perl582/lib/5.8.2/i386-freebsd/Config.pm 
/usr/local/perl582/lib/5.8.2/i386-freebsd/CORE/config.h
    Cleaning current config before rebuilding Makefile...
    mv: rename Makefile to Makefile.old: No such file or directory
    *** Error code 1

(Worked okay with the ExtUtils::MakeMaker supplied with perl 5.8.2)

Tim.