diff --git a/hosts/common/system/configs/lsof/default.nix b/hosts/common/system/configs/lsof/default.nix
new file mode 100644
index 0000000..adb89ab
--- /dev/null
+++ b/hosts/common/system/configs/lsof/default.nix
@@ -0,0 +1,4 @@
+{ pkgs, ... }:
+{
+  environment.systemPackages = with pkgs; [ lsof ];
+}
diff --git a/hosts/eirene/default.nix b/hosts/eirene/default.nix
index 49a16b7..0634423 100644
--- a/hosts/eirene/default.nix
+++ b/hosts/eirene/default.nix
@@ -21,6 +21,7 @@
     ../common/system/configs/git
     ../common/system/configs/gpg-agent
     ../common/system/configs/impermanence
+    ../common/system/configs/lsof
     ../common/system/configs/ncdu
     ../common/system/configs/neovim
     ../common/system/configs/networking