bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)

[gotjoshua]

Every command i run in the nix shell gets this warning:
bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)

It doesn't seem to break anything, but it is rather annoying.

I tried the suggestions from:
https://askubuntu.com/questions/599808/cannot-set-lc-ctype-to-default-locale-no-such-file-or-directory
and
https://www.linuxquestions.org/questions/linux-newbie-8/bash-warning-setlocale-lc_all-cannot-change-locale-en-us-utf-8-a-4175628657/

but i can't seem to stop this warning.

Any ideas?