these 2 derivations will be built:
  /nix/store/1lzr5c8mhkzc222m6fy8fyrgpi19pmsm-closure-info.drv
  /nix/store/6l6qw2jzszsdpqyp4ljdmrbbpq3fnjbx-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy