[Nix-dev] Reinstalling all packages into user profile?

[Marc Weber]

which is the easiest way to reinstall all user packages after updating
to verify everything can still be built and installed?
That's the only way to get rid of old store paths using gc as well.

Would it make sense to store the installation command along with names
etc so that a command nix-env --update-all can be added?

I mean if you used -A foo  -A foo could be used again.
I know that this won't work for all packages. But it's best we can do,
isn't it?

Marc Weber