bug#32018: Guixsd pull error on very old install

[Ludovic Courtès]

Hello,

swedebugia <address@hidden> skribis:

> Trying to get an updated an old GuixSD installation via guix pull on a pre 
> 0.10 GuixSD returned an error message about gexp-modules not found. (details 
> can be provided if asked). 

Could you post the full backtrace?

> I suggest we either test pulling from old versions (and fix errors) or make 
> it clear in the manual that pulling from very old GuixSD (older than 0.12?) 
> is not supported.

Pulling from a very old Guix may not work.  We try hard to keep things
running, but the old ‘guix pull’ had defects, plus the file
build-aux/build-self.scm (which ‘guix pull’ runs) might use features not
found in very old versions.

> Stating this clearly help people know what to expect.

I agree.

Thanks,
Ludo’.