these 2 derivations will be built:
  /nix/store/731qy3fzbg5k25fyrbczzppmhs4rjr6z-closure-info.drv
  /nix/store/ns8z54dqrp1q23sv0hskr2aws8qbbrjc-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy