diff --git a/configs/default.nix b/configs/default.nix
index 5923651..ee488d1 100644
--- a/configs/default.nix
+++ b/configs/default.nix
@@ -50,6 +50,7 @@ in
     ./traadfri.nix
     ./unclutter.nix
     # ./urxvt.nix
+    ./version.nix
     ./vscode.nix
     ./xautolock.nix
     # ./xresources.nix
diff --git a/configs/version.nix b/configs/version.nix
new file mode 100644
index 0000000..c41a695
--- /dev/null
+++ b/configs/version.nix
@@ -0,0 +1,7 @@
+{ lib, ... }:
+let
+  inherit (lib.sources) commitIdFromGitRepo;
+in
+{
+  environment.etc."NIVEUM_VERSION".text = commitIdFromGitRepo <niveum/.git>;
+}
diff --git a/systems/catullus/configuration.nix b/systems/catullus/configuration.nix
index 9852cb5..6510746 100644
--- a/systems/catullus/configuration.nix
+++ b/systems/catullus/configuration.nix
@@ -88,6 +88,7 @@ in {
     <niveum/configs/nixpkgs-unstable.nix>
     <niveum/configs/save-space.nix>
     <niveum/configs/tmux.nix>
+    <niveum/configs/version.nix>
     <niveum/configs/traadfri.nix>
     <niveum/modules/retiolum.nix>
     <niveum/modules/telegram-bot.nix>