The current stable upstream version at the time of this writing is 5.6.0. There is currently work in progress on the next major revision, although the specifications have yet to be finalised.

It is anticipated that when Perl 6 is released it will initially be packaged as perl6, install the binary as /usr/bin/perl6 and use different directories for packaged modules to perl:

/usr/lib/perl6
/usr/share/perl6

This will allow Perl 5 and 6 packages and modules (which should be packaged as libfoo-bar-perl6), to co-exist for as long as required.

At some stage in the future when Perl 6 is sufficiently mature, the package naming may be reversed such that the perl package contains Perl 6 and the current package becomes perl5.