these 2 derivations will be built:
  /nix/store/9zfmqfvih6jjh2ngiz6dhxn0gzwcqadk-generate-dependency-diagram.drv
  /nix/store/4n88bj202zy03sj11124bvjkpgvnrwzg-check-dependency-diagram.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy