Kevin A. McGrail  to Justin, dev:

'I'll vote +1 so he [Mark] can talk about it.  With sa-update now we required, we should add Archive::Tar as a requirement to the Makefile.PL, yes?

# also see CURRENT_PM below
  'PREREQ_PM' => {
      'Digest::SHA1'  => 0,             # 2.0 is oldest tested version
      'File::Spec'    => 0.8,           # older versions lack some routines we need
      'File::Copy'    => 2.02,          # this version is shipped with 5.005_03, the oldest version known to work
      'Pod::Usage'    => 1.10,          # all versions prior to this do seem to be buggy
      'HTML::Parser'  => 3.43,          # the HTML code is based on this parser, older versions have utf-8 bugs
      'Net::DNS'      => (RUNNING_ON_WINDOWS ? 0.46 : 0.34), # bugs in older revs
      'NetAddr::IP'   => 0,
      'Sys::Hostname' => 0,
      'Time::HiRes'   => 0,
      'Time::Local'   => 0,
      'Errno'         => 0,
  },

And/or edit the Mail::SpamAssassin::Util::DependencyInfo as well.