i18n.extraLocaleSettings does not behave as expected

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1

I have bit of a weird setup, because I want my system in en_US.UTF-8, but I also want a sane date format so I set LC_TIME to en_GB.UTF-8, and because I’m from Czechia I set for ex. LC_MONETARY to cs_CZ.UTF-8.

So my locale settings look something like this:

{
  # ...
  i18n = {
    defaultLocale = "en_US.UTF-8";
    extraLocaleSettings = {
      LC_TIME = "en_GB.UTF-8";
      LC_MONETARY = "cs_CZ.UTF-8";
      # Some other settings set to cs_CZ.UTF-8
    };
  };
  # ...
}

But when I run locale it returns this:

LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC=en_GB.UTF-8
LC_TIME=en_GB.UTF-8
LC_COLLATE="en_US.UTF-8"
LC_MONETARY=en_GB.UTF-8
LC_MESSAGES="en_US.UTF-8"
LC_PAPER=en_GB.UTF-8
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT=en_GB.UTF-8
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

It kinda feels like a bug, but I’m probably just doing something wrong and completely missing it

2

This should work, but you will need to either reboot or login again for the session variables to change.

3

It’s been a few days since I set it up. But just to double check I did re-run nixos-rebuild switch and rebooted, still nothing. Here is my config (I actually haven’t set all of the settings I want to set because I noticed it does not work)