direnv integration with
nix-shell and it makes for a very nice workflow, and I always get the most recent version of all, say, my R packages whenever I do a system
--update, which is good.
However it might happen that I leave the code for a couple of months (durnig which I might
nix-collect-garbage), go back to it, get a flurry of new package versions, and something doesn’t work anymore.
In order to pinpoint what the problem is, it would be useful to know which was the version of each package that was installed (or rather, linked to the environment) through the
default.nix during the last
Is there a way to get that information, so that I can save it to a file and compare later? Something like:
default.nix run, 2018-11-26 R,3.4.5 shiny,2.3.4 ...