diff --git a/machine/imperium/default.nix b/machine/imperium/default.nix
index 40b5bd7..2670dd7 100644
--- a/machine/imperium/default.nix
+++ b/machine/imperium/default.nix
@@ -85,6 +85,9 @@
     gthumb
     libreoffice
     mpv
+    nix-output-monitor  # nix build tree utility
+    nix-tree            # visualize dependency graphs
+    nixpkgs-review      # review PRs to nixpkgs
     obsidian
     openai-whisper
     pv