diff --git a/pkgs/build-support/build-fhsenv-bubblewrap/default.nix b/pkgs/build-support/build-fhsenv-bubblewrap/default.nix
index 2c6a297cb7cb..b3406d062449 100644
--- a/pkgs/build-support/build-fhsenv-bubblewrap/default.nix
+++ b/pkgs/build-support/build-fhsenv-bubblewrap/default.nix
@@ -348,6 +348,8 @@ runCommandLocal name
     // {
       inherit nativeBuildInputs;
 
+      __structuredAttrs = true;
+
       passthru = passthru // {
         env =
           runCommandLocal "${name}-shell-env"