On Mon, Jul 02, 2018 at 11:39:40AM +0200, Ludovic Courtès wrote: > Hello, > > swedebugia <[email protected]> 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.
How about making sure that 'guix pull' works between major releases? That should be reasonably easy to test. When there is a disruptive release for guix pull make sure the user upgrades to the closest previous release first. I.e., multi-step releases are less fraught with breakage. That way you get an incremental path to upgrade. And you only need to test between major releases. Pj.
