The dependencies install ok, but when it comes to Inline::Perl5, the process croaks

Aaah ... in the Inline::Perl5 README, I had missed that perl5 needs to be built with -Duseshrplib.
(The README actually states that -Duseshrplib is needed if you build perl with perlbrew or plenv. I use neither of those and therefore didn't really pay much attention to the actual directive but, of course, -Duseshrplib will be needed irrespective of *how* one builds perl.)

Anyway, I've now built a perl 5.22.0 (with -Duseshrplib) specifically for use with perl6.
And Inline::Perl5 now installs fine with panda !!

Thanks to all for the guidance.

Cheers,
Rob