diff --git a/modules/nixos/tools/telegraf/default.nix b/modules/nixos/tools/telegraf/default.nix
index f20a0bf..4e78ca6 100644
--- a/modules/nixos/tools/telegraf/default.nix
+++ b/modules/nixos/tools/telegraf/default.nix
@@ -306,11 +306,13 @@ let
               build_timestamp="$(${lib.getExe' pkgs.coreutils "date"} -d "$build_datetime" +%s)"
               now="$(${lib.getExe' pkgs.coreutils "date"} +%s)"
               store_bytes="$(${lib.getExe pkgs.nix} path-info --json --json-format 1 --all --offline --no-pretty | ${lib.getExe pkgs.jq} -r 'map(.narSize // 0) | add // 0')"
+              current_system_bytes="$(${lib.getExe pkgs.nix} path-info --json --json-format 1 --closure-size /run/current-system --offline --no-pretty | ${lib.getExe pkgs.jq} -r 'to_entries[0].value.closureSize // 0')"
 
-              printf 'nix generation=%si,configured_packages=%si,store_bytes=%si,build_timestamp=%si,seconds_since_build=%si,build_datetime="%s"\n' \
+              printf 'nix generation=%si,configured_packages=%si,store_bytes=%si,current_system_bytes=%si,build_timestamp=%si,seconds_since_build=%si,build_datetime="%s"\n' \
                 "$generation" \
                 ${toString (builtins.length config.environment.systemPackages)} \
                 "$store_bytes" \
+                "$current_system_bytes" \
                 "$build_timestamp" \
                 "$((now - build_timestamp))" \
                 "$build_datetime"