Use dark themes.

nix/configuration/configuration.nix

@@ -42,7 +42,7 @@
   ];
   nix.settings.trusted-users = [ "@wheel" ];
 
-  boot.kernelPackages = pkgs.linuxPackages_6_11;
+  # boot.kernelPackages = pkgs.linuxPackages_6_11;
   hardware.enableRedistributableFirmware = true;
 
   services.getty = {

nix/configuration/hosts/odo/default.nix

@@ -3,6 +3,7 @@
   imports = [
     ./hardware-configuration.nix
     ./disk-config.nix
+    ./optimized_build.nix
   ];
 
   # Generate with `head -c4 /dev/urandom | od -A none -t x4`

nix/configuration/hosts/odo/optimized_build.nix

@@ -0,0 +1,30 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  imports = [ ];
+
+  nixpkgs.overlays = [
+    (
+      self: super:
+      let
+        optimizeWithFlags =
+          pkg: flags:
+          pkg.overrideAttrs (old: {
+            NIX_CFLAGS_COMPILE = [ (old.NIX_CFLAGS_COMPILE or "") ] ++ flags;
+          });
+      in
+      {
+        linux_znver4 = optimizeWithFlags super.linux_zen [
+          "-march=znver4"
+          "-mtune=znver4"
+        ];
+      }
+    )
+  ];
+
+  boot.kernelPackages = lib.mkIf (!config.me.buildingIso) (pkgs.linuxPackagesFor pkgs.linux_znver4);
+}

nix/configuration/roles/sway/default.nix

@@ -298,11 +298,13 @@ in
       ''
         export WLR_RENDERER_ALLOW_SOFTWARE=1
         export NIXOS_OZONE_WL=1 # Wayland support for chromium and electron
+        export QT_QPA_PLATFORMTHEME=gtk3 # Use gtk theme in Qt applications
       ''
     else
       ''
         export WLR_RENDERER=vulkan
         export NIXOS_OZONE_WL=1 # Wayland support for chromium and electron
+        export QT_QPA_PLATFORMTHEME=gtk3 # Use gtk theme in Qt applications
       '';
 
   programs.sway = {
@@ -366,5 +368,10 @@ in
           source = ./files/mimeapps.list;
         };
       };
+      home.file = {
+        ".config/gtk-3.0/settings.ini" = {
+          source = ./files/settings.ini;
+        };
+      };
     };
 }

nix/configuration/roles/sway/files/settings.ini

@@ -0,0 +1,2 @@
+[Settings]
+gtk-application-prefer-dark-theme=1