these 2 derivations will be built:
  /nix/store/cx0wyqqqklrnwasha0mx8f9j8yjvw9x6-source.drv
  /nix/store/d94jyl8jza2ml7yplxvyiblq3kj1qa67-bernstein-3.19.0.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy