Add powertop.

nix/configuration/hosts/odo/default.nix

@@ -4,6 +4,7 @@
     ./hardware-configuration.nix
     ./disk-config.nix
     ./optimized_build.nix
+    ./power_management.nix
   ];
 
   # Generate with `head -c4 /dev/urandom | od -A none -t x4`

nix/configuration/hosts/odo/power_management.nix

@@ -0,0 +1,14 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [ ];
+
+  environment.systemPackages = with pkgs; [
+    powertop
+  ];
+}