my $ok = $self->_run("sh configure @{[$self->notes('configure_args')]}");

##</code><code>##

Running sh configure --libdir=C:\Perl\site\lib\Alien\SVN --prefix=C:\Perl\site PERL=c:\perl\bin\perl.exe
'sh' is not recognized as an internal or external command, operable program or batch file.
configuring SVN failed at inc/My/SVN/Builder.pm line 114, <STDIN> line 3.
    Something went wrong with the Subversion configuration.
    Please attempt to correct it and re-run Build.PL.