these 2 derivations will be built:
  /nix/store/vy44pq53bfdjg9ad5j6hiy8r11hklkmp-closure-info.drv
  /nix/store/4fw75g11g34y5d6j2mjrz7rrr1xm4mmv-check-vars.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy