Install icons from nixpkgs

Help
1

Hi,
I want to add icons, which i can use with eww, but i don’t see them with fc-list.
I tried Installing candy-icons and papirus-icon-theme but none worked.
I tried installing them as system Package and also in fonts:

fonts = {
      packages = with pkgs; [
      fira-code
      fira-code-symbols
      candy-icons
      papirus-icon-theme
    ];
    fontDir.enable = true;
    fontconfig.enable = true;
    #      fonts = with pkgs; [        candy-icons ];
    #enableDefaultFonts = true;
  };
services.xserver.gdk-pixbuf.modulePackages = [ pkgs.librsvg ];

but none of them seem to work.
Also AI was no help. I don’t know if it’s important, but I’m using Hyprland with wayland.

2

What did you search for in fc-list/fc-match? And yeah the fonts must go in fonts.packages if you want them to show up in fontconfig, remove it from environment.systemPackages.

3

I searched for papirus and candy, which showed no results even after removing from environment.systemPackages, but i got nerdfonts working.