these 2 derivations will be built:
  /nix/store/bzv2r2fpc6lmvy8lah1ng7vksi8ps8fg-closure-info.drv
  /nix/store/mbyr64c06arq9qms5a4wj9bmw8b71dqm-check-vars.drv
building '/nix/store/bzv2r2fpc6lmvy8lah1ng7vksi8ps8fg-closure-info.drv'
closure-info> structuredAttrs is enabled