From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark H Weaver <mhw@netris.org>
Subject: Re: 01/01: gnu: Add perl-inline-c.
Date: Tue, 03 Apr 2018 15:34:50 -0400
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In-Reply-To: <20180403170021.jmctpswhcfniblt3@abyayala> (Nils Gillmann's
	message of "Tue, 3 Apr 2018 17:00:21 +0000")
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To: Roel Janssen <roel@gnu.org>
Cc: guix-devel@gnu.org

Nils Gillmann <ng0@n0.is> writes:

>> > Ludovic Court=C3=A8s <ludo@gnu.org> writes:
>> >
>> >> roel@gnu.org (Roel Janssen) skribis:
>> >>
>> >>> +    (license (package-license perl))))
>> >>
>> >> Could you use (license perl-license) instead?  It doesn=E2=80=99t mak=
e any
>> >> difference in this case but it=E2=80=99s generally =E2=80=9Csafer=E2=
=80=9D (see (guix
>> >> licenses)).
>
> Can you tell me why it is safer to say perl-license instead of package-li=
cense perl?

I'm not a laywer, but if a future version of 'perl' were released under
a different license, I strongly doubt that this would retroactively
change the licenses of any earlier works.  That's exactly what would
happen in Guix if we write (license (package-license perl)) and then
later change the 'license' field of the 'perl' package.

       Mark