diff --git a/pkgs/tools/misc/ncdu/default.nix b/pkgs/tools/misc/ncdu/default.nix
index 0cfb78bcf0bc..4844e81079a6 100644
--- a/pkgs/tools/misc/ncdu/default.nix
+++ b/pkgs/tools/misc/ncdu/default.nix
@@ -19,6 +19,9 @@ stdenv.mkDerivation rec {
 
   PREFIX = placeholder "out";
 
+  # Avoid CPU feature impurity, see https://github.com/NixOS/nixpkgs/issues/169461
+  ZIG_FLAGS = "-Drelease-safe -Dcpu=baseline";
+
   meta = with lib; {
     description = "Disk usage analyzer with an ncurses interface";
     homepage = "https://dev.yorhel.nl/ncdu";