Fish shows weird error when I do basically anything

[Malternative3772]

Willkommen zu fish, der freundlichen interaktiven Shell
Type `help` for instructions on how to use fish
fish: Unknown command: hostname
~/.config/fish/functions/fish_prompt.fish (line 1): 
hostname|cut -d . -f 1
^
in command substitution
        called on line 7 of file ~/.config/fish/functions/fish_prompt.fish
in function 'fish_prompt'
in command substitution
~/.config/fish/functions/fish_prompt.fish: Unknown error while evaluating command substitution
in function 'fish_prompt'
in command substitution

╰─λ                                                                                                           0 (0.000s) < 19:00:02

So everytime I open the Terminal or try to execute any command it shows this error. I normaly use the KDE console on Arch Linux, but I also tried this in Alacritty and it doesn't work.

[Malternative3772]

Ok, I installed inetutils, which fixed it