diff --git a/pkgs/by-name/tt/tt-system-tools/package.nix b/pkgs/by-name/tt/tt-system-tools/package.nix
index c443b2ca2c2c..1932478f690d 100644
--- a/pkgs/by-name/tt/tt-system-tools/package.nix
+++ b/pkgs/by-name/tt/tt-system-tools/package.nix
@@ -3,8 +3,7 @@
   stdenvNoCC,
   fetchFromGitHub,
   makeWrapper,
-  # Remove "? null" once https://github.com/NixOS/nixpkgs/pull/444714 is merged
-  tt-smi ? null,
+  tt-smi,
   pstree,
 }:
 stdenvNoCC.mkDerivation (finalAttrs: {