these 2 derivations will be built:
  /nix/store/7lrjva2b82rr96i8h8hv532q2vq7ssna-closure-info.drv
  /nix/store/6jkcp9crxiwd27wf4av5w2p4kq6mk28s-check-vars.drv
building '/nix/store/7lrjva2b82rr96i8h8hv532q2vq7ssna-closure-info.drv'
closure-info> structuredAttrs is enabled