Add fontconfig default fonts configuration.

.bauke/nix/stardust/system.nix

@@ -22,7 +22,17 @@
     shells = [ pkgs.zsh ];
   };
 
-  fonts.fonts = with pkgs; [
+  fonts = {
+    fontconfig = {
+      defaultFonts = {
+        emoji = [ "Noto Color Emoji" ];
+        monospace = [ "Hasklig" "Victor Mono" "DejaVu Sans Mono" ];
+        sansSerif = [ "Inter" "DejaVu Sans" ];
+        serif = [ "Inter" "DejaVu Sans" ];
+      };
+    };
+
+    fonts = with pkgs; [
       hasklig
       inter
       iosevka
@@ -30,6 +40,7 @@
       victor-mono
       (nerdfonts.override { fonts = [ "Hasklig" ]; })
     ];
+  };
 
   hardware = {
     opengl = {