I'm using the Math::Pari ppm but it's build process seems to only use the unix source PariBuild.pm

sub download_pari {
  my ($srcfile, $force) = (shift, shift);
  my $host = 'megrez.math.u-bordeaux.fr';
  my $dir  = '/pub/pari/unix/';
  my($ftp, $ua, $base_url);
  ...
[download]

There is a windows build at ftp://megrez.math.u-bordeaux.fr/pub/pari/windows/ which may avoid the problem although I haven't yet tried to use it.

Thanks for your reply