diff --git a/pkgs/luwen/default.nix b/pkgs/luwen/default.nix
index a15bc7b..0ae5065 100644
--- a/pkgs/luwen/default.nix
+++ b/pkgs/luwen/default.nix
@@ -4,6 +4,8 @@ let
 
   # Upstream does not vendor a lock file so one has to created manually
   # `cargo generate-lockfile`
+  # Use verson needed by tt-smi
+  # https://github.com/tenstorrent/tt-smi/blob/main/pyproject.toml#L30
   version = "0.4.9";
 
   src = pkgs.fetchFromGitHub {
diff --git a/pkgs/tools-common/default.nix b/pkgs/tools-common/default.nix
index f6f1922..dac5b00 100644
--- a/pkgs/tools-common/default.nix
+++ b/pkgs/tools-common/default.nix
@@ -4,13 +4,14 @@ with pkgs.python3Packages;
 
 buildPythonPackage rec {
   pname = "tools-common";
-  version = "1.4.12";
+  # https://github.com/tenstorrent/tt-smi/blob/main/pyproject.toml#L31
+  version = "1.4.11";
 
   src = pkgs.fetchFromGitHub {
     owner = "tenstorrent";
     repo = "tt-tools-common";
     rev = "refs/tags/v${version}";
-    sha256 = "sha256-FKV1ojY9m5aRfnrU6LjXVcUnNAmNNXiGaUax6RE/8Vs=";
+    sha256 = "sha256-Q5GpT6B3pamY6bUjPbvNJ11npiR4q/6QMjRxovQ/MZ0=";
   };
 
   format = "pyproject";