nix-shell should not mess with TZ

[bennofs]

Currently, nix-shell unsets or preserves the TZ environment variable, even with --pure. I think it should just use the TZ environment variable that the build sets, which is UTC for stdenv.

[copumpkin]

Agreed. @domenkozar @edolstra @shlevy any thoughts?

[shlevy]

Hmm, why is this problematic?

[bennofs]

@shlevy I believe this was problematic with a combination of fake-time, where 0 unix-time was now +1h unix time in nix-shell. I'm sorry, I don't recall exactly what the issue was, I now find that my initial issue description is really poor :|

[stale]

I marked this as stale due to inactivity. → More info