diff --git a/pkgs/build-support/build-mozilla-mach/default.nix b/pkgs/build-support/build-mozilla-mach/default.nix
index 67312aa0e186..963fe1edbe75 100644
--- a/pkgs/build-support/build-mozilla-mach/default.nix
+++ b/pkgs/build-support/build-mozilla-mach/default.nix
@@ -303,6 +303,9 @@ buildStdenv.mkDerivation {
 
   inherit src unpackPhase;
 
+  __structuredAttrs = true;
+  strictDeps = true;
+
   meta =
     meta
     // lib.optionalAttrs stdenv.hostPlatform.isDarwin {