The current release of p5-Module-Build has a small bug in it which was introduced at some point after 0.35.  I noticed it when sending in another Perl port that used this module to build and didn't have any initial problems (with my old version of Module::Build) until I submitted and the port was build against a current tree.  For details of that see ports/145386.  That port is essentially dependent on an update to the Module::Build one.

I've contacted the maintainer twice with no reply (over a period of a couple of weeks) so have submitted this patch to update the existing port to version 0.3607.

Basically during the prerequisites check done in Module::Build, version numbers are matched using
the following function:

sub _simple_prereq {
  return $_[0] =~ /^[0-9_]+\.?[0-9_]*$/; # crudly, a decimal literal
}

That's called from a simple loop that checks the versions:

for my $p ( $req, $breq ) {
    for my $k (keys %$p) {
      die "Prereq '$p->{$k}' for '$k' is not supported by
Module::Build::Compat\n"
        unless _simple_prereq($p->{$k});
    }
  }

Unfortunately my port of File::BOM (and other future ports I imagine) include the perl version as a
prerequisite, so in my case File::BOM fails with the following error:

  Prereq '5.8.3' for 'perl' is not supported by Module::Build::Compat

The latest version of Module::Build has a small fix to stop this problem,
which essentially ignores "simple" version number checks when the perquisite
is 'perl'.  That loop from above becomes:

for my $p ( $req, $breq ) {
    for my $k (keys %$p) {
      next if $k eq 'perl';
      die "Prereq '$p->{$k}' for '$k' is not supported by
Module::Build::Compat\n"
        unless _simple_prereq($p->{$k});
    }
  }

How-To-Repeat: Try installing my uncommitted port here: ports/145386