Hi Guix,

I've never been able to add modules to perl.scm. Today civodul showed me that
it's because "(package-license perl)" in at least a few other files were causing
circular dependencies with perl.scm. I don't know how to figure out exactly
which were causing this for perl.scm, so I've changed this in every file with
this (except perl.scm) to have "license:perl-license" instead. (Fixing just
what I'd have needed seems like leaving a problem for the next person anyway.)

With this patch I can add modules to perl.scm :)

Best,
Petter


P.S.  The error I got was the same as I get with most of my errors: "unknown
package". At this point I'm beginning to interpret "unknown package" as
"something failed". I find it that unhelpful, but more misleading. Maybe we
should discuss this.