Hi,
On Wed, 15 Feb 2023 at 13:33, Leo Famulari <[email protected]> wrote:
> I'd guess it's happened 4 times in the last several years.
>
> It's one of several reasons that rebuilding old Guix releases actually
> approaches being a Hard Problem.
The issue is from the impure world. ;-)
Well, yeah it would probably be difficult to install from scratch Guix
v1.0 in some future.
However, the hope is that,
guix time-machine --commit=v1.0 -- <command>
using distant future Guix to run <command> from Guix v1.0. The distant
future Guix should be able to deal with the distant future impure world
and populate for the past <command> running inside a pure world.
For sure, it is a Hard Problem. As I like to say when presenting “guix
time-machine”, it is a real world experiment, probably unique, to know
what is the size of the time frame where reproducible time-travel is
possible. I try to explain that this reproducible time-travel requires
three conditions:
1. source code availability
2. Linux kernel compatibility
3. hardware compatibility
Now, I would add:
4. being able to communicate with the world via the network
Cheers,
simon
