diff --git a/nixos/boxes/cli.nix b/nixos/boxes/cli.nix
index 22e54870..23c16f78 100644
--- a/nixos/boxes/cli.nix
+++ b/nixos/boxes/cli.nix
@@ -1,6 +1,6 @@
 { config, pkgs, ... }:
 {
   environment.systemPackages = with pkgs; [
-    vim tmux atop btrfs-progs
+    vim tmux atop btrfs-progs compsize
   ];
 }