Re: Finding versions of packages

[zimoun <zimon.toutoune@gmail.com>]

Hi Ludo,

On Mon, 14 Dec 2020 at 11:38, Ludovic Courtès <ludo@gnu.org> wrote:

> However, it might give the false idea that users can pick
> package versions independently (as in: I want esbuild X, GCC Y, and Go
> Z), which is not really the case: packages are interrelated.

Someone tried that on help-guix.  The idea was to recreate a Python
environment.  It was an extensive use of inferiors: one inferior per
package.  We already discussed that when discussing how to recreate a
profile from a <profile>/manifest file.  

Just to point the manual about inferiors:

--8<---------------cut here---------------start------------->8---
   Sometimes you might need to mix packages from the revision of Guix
you’re currently running with packages available in a different revision
of Guix.  Guix “inferiors” allow you to achieve that by composing
different Guix revisions in arbitrary ways.
--8<---------------cut here---------------end--------------->8---

Therefore, I want esbuild X (compiled with GCC A and foo A), GCC Y (compiled with
foo B) and Go Z (compiled with foo C).  It is technically possible, right?

<https://yhetil.org/guix/875z5m5v0q.fsf@branjam-ASM100.i-did-not-set--mail-host-address--so-tickle-me>


Cheers,
simon