Installing monospaced font in nixos

One day I have realized that it would be nice if Emacs would auto complete my writing. Not coding (have corfu for that), but writing. Remembered that company-mode does that.

Okay, installed company and then noticed that it's misbehaving.. So I created an issue - https://github.com/company-mode/company-mode/discussions/1475#discussioncomment-9732566

Then realized it's not a problem with company-mode, but it's a problem with fonts on my NixOS installation.

Let's try to fix it:

Check the fonts on nixos:

nixos-option fonts.packages

List the fonts:

fc-list

Got recommended to install fira-code font.

On work machine nixos installed it as such (emacs used it by default):

# fire-code monospace font, so stuff is aligned in Emacs
fira-code

AT home machine installed as such(for some reason had to explicitly apply the font also):

# installing monospaced font so stuff aligns well in Emacs
fira-code

fonts = {
    enableDefaultFonts = true;
    fonts = with pkgs; [ fira-code ];
};

Then everything was fixed. Wohoo!