diff --git a/home-manager/common.nix b/home-manager/common.nix
index b4400e2..0d5b1cd 100644
--- a/home-manager/common.nix
+++ b/home-manager/common.nix
@@ -4,6 +4,7 @@
   fonts.fontconfig.enable = true;
 
   home.packages = (with pkgs; [
+    btop
     tmux
     manix
     clang
diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index ff62357..f156626 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -81,16 +81,9 @@
   # Enable CUPS to print documents.
   services.printing.enable = true;
 
-  # Enable sound with pipewire.
+  # Enable sound with 
   sound.enable = true;
-  hardware.pulseaudio.enable = false;
-  security.rtkit.enable = true;
-  services.pipewire = {
-    enable = true;
-    alsa.enable = true;
-    alsa.support32Bit = true;
-    pulse.enable = true;
-  };
+  hardware.pulseaudio.enable = true;
 
   # Change default shell to zsh.
   users.defaultUserShell = pkgs.zsh;
@@ -118,6 +111,7 @@
     vim
     git
     picom
+    killall
   ];
 
   system.stateVersion = "23.11";