these 2 derivations will be built:
  /nix/store/y1jc49jkxmfr1la9k0nk4whgpv38mk74-closure-info.drv
  /nix/store/n0iqn275l2531dc05qhcrfap8zykrpnw-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy