Disable default fonts, now M+ displays in Firefox instead of unifont

hosts/desktop.nix

@@ -44,12 +44,15 @@ in
   hardware.pulseaudio.enable = true;
   nixpkgs.config.pulseaudio = true;
 
-  fonts.fonts = with pkgs; [
-    # noto-fonts-cjk doesn't display in Discord for some reason
-    # mplus-outline-fonts.osdnRelease is no longer updated and is now mplus-outline-fonts.githubRelease,
-    # but で renders weird for some reason in the GitHub release, so I'm sticking to OSDN
-    mplus-outline-fonts.osdnRelease
-    noto-fonts
-    (nerdfonts.override { fonts = [ "FiraCode" ]; }) # required for icons
-  ];
+  fonts = {
+    enableDefaultFonts = false;
+    fonts = with pkgs; [
+      # noto-fonts-cjk doesn't display in Discord for some reason
+      # mplus-outline-fonts.osdnRelease is no longer updated and is now mplus-outline-fonts.githubRelease,
+      # but で renders weird for some reason in the GitHub release, so I'm sticking to OSDN
+      mplus-outline-fonts.osdnRelease
+      noto-fonts
+      (nerdfonts.override { fonts = [ "FiraCode" ]; }) # required for icons
+    ];
+  };
 }