[taylanub]

Thanks for the clarification. Further clarification:

I need to refresh my knowledge before I'm sure, but I think that statement regarding dependencies only goes for build-time dependencies. An update to a run-time dependency wouldn't require a rebuild of the dependent.

And the build-time dependencies' up-to-date status is not very important most of the time. "Does it matter whether I used Bash 4.0 or 4.2 to run that ./configure script?" Nope. I'm not sure to what extent this carries over to practice so far; the recent security patches to Bash did cause a total rebuild in Guix. I hope that will change by the time 1.0 is released. Theoretically, you could use the same build-time-dependency packages for years (e.g. a "bash-for-building" package), yet quickly deploy bleeding edge versions to users (proper "bash" package).