diff --git a/pkgs/by-name/ka/kanidm/package.nix b/pkgs/by-name/ka/kanidm/package.nix
index de9694227fcd..855bd8a12526 100644
--- a/pkgs/by-name/ka/kanidm/package.nix
+++ b/pkgs/by-name/ka/kanidm/package.nix
@@ -71,6 +71,9 @@ rustPlatform.buildRustPackage rec {
     cp -r server/web_ui/pkg $out/ui
   '';
 
+  # Otherwise build breaks on some unused code
+  env.RUSTFLAGS = "-A dead_code";
+
   # Not sure what pathological case it hits when compiling tests with LTO,
   # but disabling it takes the total `cargo check` time from 40 minutes to
   # around 5 on a 16-core machine.