On Thu, May 25, 2017 at 07:57:41AM -0700, Chris Marusich wrote:
> I use Git when I want to hack on Guix.  Otherwise, I use 'guix pull'.
> IMO, the biggest problem with 'guix pull' is that there is no easy
> rollback.  I can live with long execution times (--fallback is fine, but
> it'd be nice if substitutes were available more often), and I can live
> with 'guix pull' causing me to get a version of guix that's broken
> somehow, but the inability to easily roll back when things go south
> makes me hesitant to run 'guix pull' regularly.

It's not "easy rollback", but you can at least use it to deploy any Guix
commit, from any source, with the '--url=' argument.