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From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: chicken scheme
Date: Sun, 17 Jul 2016 19:45:19 +0200
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To: John J Foerch <jjfoerch@earthlink.net>
Cc: help-guix@gnu.org

Hello!

John J Foerch <jjfoerch@earthlink.net> skribis:

> I'm finally getting back to this.  One point about chicken is that it
> does not support multiple extension directories, only one.  They go into
> <VARDIR>/chicken/<BINARY-VERSION>.  This introduces a difficulty because
> if VARDIR is /var/lib, then the default extensions (that come with
> chicken) get installed to a global directory.  The chicken-install
> system will then work, but in the future when we add a package importer,
> imported packages would also go into this global directory.
>
> If on the other hand, VARDIR is (string-append out "/var/lib") the
> default extensions and imported extensions go to the right place, but
> manual chicken-install cannot write to that location.
>
> Any further thoughts on this, given that information?

Ouch, that=E2=80=99s a problem.

Nixpkgs uses VARDIR=3DOUT/var/lib, meaning that chicken-install does not
work.

However, it also contains an optional patch that allows extensions to be
searched for elsewhere:

  https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/compilers/c=
hicken/0001-Introduce-CHICKEN_REPOSITORY_EXTRA.patch

I think the best course of action would be to submit this change
upstream, if it hasn=E2=80=99t been done already.  It=E2=80=99s useful beyo=
nd Nix and
Guix, so it probably makes sense to include it.

In the meantime, I would (temporarily) sacrifice chicken-install in
favor of an Egg importer.

WDYT?

Thanks,
Ludo=E2=80=99.